Final Concert of the Anonymous 4 at the Metropolitan Museum of Art

New York, New York - Dec. 22, 2015 : The Anonymous 4 (IV) performing at the Metropolitan Museum of Art in the Medieval Sculpture Hall in front of the Christmas Tree during their final performance. Seen here (l to r) Susan Hellauer, Marsha Genensky, Ruth Cunningham and Jacqueline Horner-Kwiatek - Credit: Robert Altman

Final Concert of the Anonymous 4 at the Metropolitan Museum of Art

New York, New York - Dec. 22, 2015 : The Anonymous 4 (IV) performing at the Metropolitan Museum of Art in the Medieval Sculpture Hall in front of the Christmas Tree during their final performance. Seen here (l to r) Susan Hellauer, Marsha Genensky, Ruth Cunningham and Jacqueline Horner-Kwiatek - Credit: Robert Altman

Final Concert of the Anonymous 4 at the Metropolitan Museum of Art

New York, New York - Dec. 22, 2015 : The Anonymous 4 (IV) performing at the Metropolitan Museum of Art in the Medieval Sculpture Hall in front of the Christmas Tree during their final performance. Seen here (l to r) Susan Hellauer, Marsha Genensky, Ruth Cunningham and Jacqueline Horner-Kwiatek - Credit: Robert Altman

Final Concert of the Anonymous 4 at the Metropolitan Museum of Art

New York, New York - Dec. 22, 2015 : The Anonymous 4 (IV) performing at the Metropolitan Museum of Art in the Medieval Sculpture Hall in front of the Christmas Tree during their final performance. Seen here (l to r) Susan Hellauer, Marsha Genensky, Ruth Cunningham and Jacqueline Horner-Kwiatek - Credit: Robert Altman

Final Concert of the Anonymous 4 at the Metropolitan Museum of Art

New York, New York - Dec. 22, 2015 : The Anonymous 4 (IV) performing at the Metropolitan Museum of Art in the Medieval Sculpture Hall in front of the Christmas Tree during their final performance. Seen here (l to r) Susan Hellauer, Marsha Genensky, Ruth Cunningham and Jacqueline Horner-Kwiatek - Credit: Robert Altman

Final Concert of the Anonymous 4 at the Metropolitan Museum of Art

New York, New York - Dec. 22, 2015 : The Anonymous 4 (IV) performing at the Metropolitan Museum of Art in the Medieval Sculpture Hall in front of the Christmas Tree during their final performance. Seen here (l to r) Susan Hellauer, Marsha Genensky, Ruth Cunningham and Jacqueline Horner-Kwiatek - Credit: Robert Altman

Final Concert of the Anonymous 4 at the Metropolitan Museum of Art

New York, New York - Dec. 22, 2015 : The Anonymous 4 (IV) performing at the Metropolitan Museum of Art in the Medieval Sculpture Hall in front of the Christmas Tree during their final performance. Seen here (l to r) Susan Hellauer, Marsha Genensky, Ruth Cunningham and Jacqueline Horner-Kwiatek - Credit: Robert Altman

Final Concert of the Anonymous 4 at the Metropolitan Museum of Art

New York, New York - Dec. 22, 2015 : The Anonymous 4 (IV) performing at the Metropolitan Museum of Art in the Medieval Sculpture Hall in front of the Christmas Tree during their final performance. Seen here (l to r) Susan Hellauer, Marsha Genensky, Ruth Cunningham and Jacqueline Horner-Kwiatek - Credit: Robert Altman

Final Concert of the Anonymous 4 at the Metropolitan Museum of Art

New York, New York - Dec. 22, 2015 : The Anonymous 4 (IV) performing at the Metropolitan Museum of Art in the Medieval Sculpture Hall in front of the Christmas Tree during their final performance. Seen here (l to r) Susan Hellauer, Marsha Genensky, Ruth Cunningham and Jacqueline Horner-Kwiatek - Credit: Robert Altman

Final Concert of the Anonymous 4 at the Metropolitan Museum of Art

New York, New York - Dec. 22, 2015 : The Anonymous 4 (IV) performing at the Metropolitan Museum of Art in the Medieval Sculpture Hall in front of the Christmas Tree during their final performance. Seen here (l to r) Susan Hellauer, Marsha Genensky, Ruth Cunningham and Jacqueline Horner-Kwiatek - Credit: Robert Altman

Final Concert of the Anonymous 4 at the Metropolitan Museum of Art

New York, New York - Dec. 22, 2015 : The Anonymous 4 (IV) performing at the Metropolitan Museum of Art in the Medieval Sculpture Hall in front of the Christmas Tree during their final performance. Seen here (l to r) Susan Hellauer, Marsha Genensky, Ruth Cunningham and Jacqueline Horner-Kwiatek - Credit: Robert Altman

Final Concert of the Anonymous 4 at the Metropolitan Museum of Art

New York, New York - Dec. 22, 2015 : The Anonymous 4 (IV) performing at the Metropolitan Museum of Art in the Medieval Sculpture Hall in front of the Christmas Tree during their final performance. Seen here (l to r) Susan Hellauer, Marsha Genensky, Ruth Cunningham and Jacqueline Horner-Kwiatek - Credit: Robert Altman

Final Concert of the Anonymous 4 at the Metropolitan Museum of Art

New York, New York - Dec. 22, 2015 : The Anonymous 4 (IV) performing at the Metropolitan Museum of Art in the Medieval Sculpture Hall in front of the Christmas Tree during their final performance. Seen here (l to r) Susan Hellauer, Marsha Genensky, Ruth Cunningham and Jacqueline Horner-Kwiatek - Credit: Robert Altman

Final Concert of the Anonymous 4 at the Metropolitan Museum of Art

New York, New York - Dec. 22, 2015 : The Anonymous 4 (IV) performing at the Metropolitan Museum of Art in the Medieval Sculpture Hall in front of the Christmas Tree during their final performance. Seen here (l to r) Susan Hellauer, Marsha Genensky, Ruth Cunningham and Jacqueline Horner-Kwiatek - Credit: Robert Altman

Final Concert of the Anonymous 4 at the Metropolitan Museum of Art

New York, New York - Dec. 22, 2015 : The Anonymous 4 (IV) performing at the Metropolitan Museum of Art in the Medieval Sculpture Hall in front of the Christmas Tree during their final performance. Seen here (l to r) Susan Hellauer, Marsha Genensky, Ruth Cunningham and Jacqueline Horner-Kwiatek - Credit: Robert Altman

Final Concert of the Anonymous 4 at the Metropolitan Museum of Art

New York, New York - Dec. 22, 2015 : The Anonymous 4 (IV) performing at the Metropolitan Museum of Art in the Medieval Sculpture Hall in front of the Christmas Tree during their final performance. Seen here (l to r) Jacqueline Horner-Kwiatek, Marsha Genensky, Susan Hellauer, and Ruth Cunningham - Credit: Robert Altman

Final Concert of the Anonymous 4 at the Metropolitan Museum of Art

New York, New York - Dec. 22, 2015 : The Anonymous 4 (IV) performing at the Metropolitan Museum of Art in the Medieval Sculpture Hall in front of the Christmas Tree during their final performance. Seen here (l to r) Jacqueline Horner-Kwiatek, Ruth Cunningham, Marsha Genensky, and Susan Hellauer - Credit: Robert Altman

Final Concert of the Anonymous 4 at the Metropolitan Museum of Art

New York, New York - Dec. 22, 2015 : The Anonymous 4 (IV) performing at the Metropolitan Museum of Art in the Medieval Sculpture Hall in front of the Christmas Tree during their final performance. Seen here (l to r) Susan Hellauer, Marsha Genensky, Ruth Cunningham and Jacqueline Horner-Kwiatek - Credit: Robert Altman

Final Concert of the Anonymous 4 at the Metropolitan Museum of Art

New York, New York - Dec. 22, 2015 : The Anonymous 4 (IV) performing at the Metropolitan Museum of Art in the Medieval Sculpture Hall in front of the Christmas Tree during their final performance. Seen here (l to r) Susan Hellauer, Marsha Genensky, Ruth Cunningham and Jacqueline Horner-Kwiatek - Credit: Robert Altman

Final Concert of the Anonymous 4 at the Metropolitan Museum of Art

New York, New York - Dec. 22, 2015 : The Anonymous 4 (IV) performing at the Metropolitan Museum of Art in the Medieval Sculpture Hall in front of the Christmas Tree during their final performance. Seen here (l to r) Susan Hellauer, Marsha Genensky, Ruth Cunningham and Jacqueline Horner-Kwiatek - Credit: Robert Altman

Final Concert of the Anonymous 4 at the Metropolitan Museum of Art

New York, New York - Dec. 22, 2015 : The Anonymous 4 (IV) performing at the Metropolitan Museum of Art in the Medieval Sculpture Hall in front of the Christmas Tree during their final performance. Seen here (l to r) Susan Hellauer, Marsha Genensky, Ruth Cunningham and Jacqueline Horner-Kwiatek - Credit: Robert Altman

Final Concert of the Anonymous 4 at the Metropolitan Museum of Art

New York, New York - Dec. 22, 2015 : The Anonymous 4 (IV) performing at the Metropolitan Museum of Art in the Medieval Sculpture Hall in front of the Christmas Tree during their final performance. Seen here (l to r) Susan Hellauer, Marsha Genensky, Ruth Cunningham and Jacqueline Horner-Kwiatek - Credit: Robert Altman

Final Concert of the Anonymous 4 at the Metropolitan Museum of Art

New York, New York - Dec. 22, 2015 : The Anonymous 4 (IV) performing at the Metropolitan Museum of Art in the Medieval Sculpture Hall in front of the Christmas Tree during their final performance. Seen here (l to r) Susan Hellauer, Marsha Genensky, Ruth Cunningham and Jacqueline Horner-Kwiatek - Credit: Robert Altman

Final Concert of the Anonymous 4 at the Metropolitan Museum of Art

New York, New York - Dec. 22, 2015 : The Anonymous 4 (IV) performing at the Metropolitan Museum of Art in the Medieval Sculpture Hall in front of the Christmas Tree during their final performance. Seen here (l to r) Susan Hellauer, Marsha Genensky, Ruth Cunningham and Jacqueline Horner-Kwiatek - Credit: Robert Altman