Painting shows three nude people, two men and a woman, standing arm in arm and smiling. The men depicted are most likely John Giorno (left) and Chamberlain, based on similarity to Chamberlain's painting Totem (1963-64).
Reproduction of a painting by Wynn Chamberlain, 1964 / unidentified photographer. Fischbach Gallery records, 1937-2015, bulk 1963-1977. Archives of American Art, Smithsonian Institution.
Archives of American Art, Smithsonian Institution Washington, D.C. 20560