I just stumbled upon the website "Awesome People Hanging Out Together" and found these photos. Amazing...
Jimi Hendrix and Eric Clapton
David Bowie, Art Garfunkel, Paul Simon, Yoko and John Lennon, Roberta Flack, NYC 1975
Freddie Mercury and Elton John
MJ and Paul washing some dishes...
James Brown and Mick Jagger 1964
Bob Dylan and Muhammad Ali
Janice Joplin and Grace Slick (both one of a kind)