I found the Doobie Brothers story particularly interesting/amusing.
I didn't actually go to the Moon until it was on Barrington, but saw many great acts there. Would love to have gone to the other locations, but NS liquor laws being what they were, I was too young to attend...
I've mentioned it before, but seeing Jeff Healey perform at Secretary's on a Saturday afternoon, jamming with some local musicians was a highlight to me. His Moon show was great, of course, but seeing him cut it up improvisationally was something to see/hear. Also met him that weekend, and although brief, I got the feeling that he was a really nice guy with a great sense of humour.
Lots of other great shows, but not wanting to take this tangent too far from 2215 Gottingen...