Damn! I was at SU at that time. Why wasn't I there?? I suspect b/c Jackson Browne had not yet become 'Jackson Browne' .
However, I saw THIS amazing band at Jabberwocky around the same time. This vid is apparently a rehearsal for the Flip Wilson Show in 1972, which explains the sometimes strange laughter, as something else was apparently being rehearsed at the same time. Ladeez & gentlemen: Dan Hicks & the Hot Licks, featuring the Lickettes!: