I've heard of the Avalon, but never been. Don't they have some rock shows there?? Maybe I'm thinking of something else.
That would have been the old Avalon Ballroom in San Francisco, which actually reopened a few years ago, but appears to be dormant again.
Chet Helms and The Family Dog produced shows there in the 60's, including Big Brother and The Holding Company w/Janis Joplin, the Grateful Dead, Buffalo Springfield, Captain Beefheart, Moby Grape, The Doors, etc..
poster art from that era:
http://www.wolfgangsvault.com/Catalog.aspx?VenueID=ABR&Page=5
