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Continue to ChatPOSTER FROM THE PAST: Zig-Zag Man, Big Brother and the Holding Company, Quicksilver Messenger Service, June 24 & 25 1966, Avalon Ballroom https://www.deadheadland.com/2016/06/25/poster-from-the-past-zig-zag-man-big-brother-and-the-holding-company-quicksilver-messenger-service-june-24-25-1966-avalon-ballroom/