I have a couple of funny memories of playing at London area clubs in the late 70's (and early 80's). At the Crypt at St. Martin in the Field, there were often a lot of random tourists.

I had a booking there in '79 and a fellow from Germany got up to do a floor spot. HIs introduction was in such a thick German accent that it was hard to understand. But he sang a Tom Paxton song in perfect idiomatic American English! what an ear. . .

They also had a guy who worked the light board, and it was the only place where I would change from red to green in the middle of a ballad . . . . . . very artsy. .