WIKI: The Nairobi Trio: three gorillas (wearing derby hats and long overcoats) mechanically miming to the music like wind-up toys. In the middle sat the "head gorilla," always played by Kovacs (with a cigar, of course), conducting with a baton or (sometimes) a banana. To the viewer's left another gorilla stood, holding two oversized timpani mallets. (The identity of this ape varied, but among Kovacs' celebrity friends both Jack Lemmon and Frank Sinatra are known to have performed in the skit.) And seated at screen right at a piano was a female simian (often Kovacs' wife, Edie Adams), robotically thumping up and down on the keys.
Harry Nilsson - Coconut (BBC 1971)
Nilsson does Kovacs. (via Bedazzled)
