Well I saw Led Zepplin in Philly in 71, 72? Not their first tour I see. The most anticipated and unfortunately disappointing concert I ever saw, the sound was soooooo loud that you actually couldn't hear them if that makes sense. The sound guy should have been shot.
David Bowie, did 3 shows (Ziggy Stardust) at the Tower Theater in Philly. One of the great ones, especially in a small venue, his first US tour I believe 71 or 72. Poco, Loggins and Messina, Yes, Emerson Lake and Palmer, Alice Cooper, never heard of them before, thought it was a girl, a spur of the moment thing. Bonnie Raitt at the Bijou Cafe in Philly, talk about a small venue, like the Troubadour. She played there a lot in her early years before she was known and did the big tour circuit. Speaking of the Troubadour I thought Elton John's 1st appearance in the US was there. Didn't realize he toured here in '69 or maybe the Troubadour in '69? THAT would have been one to see along with King Crimson, anyone see them on their first tour?