Well the most memorable one I heard them do *live* was in about 1974 at Leicester De Montfort Hall.

It was their version of "Rave On"!!!

Very memorable for me. It was their encore, and as they started Maddy whipped off her long dress to reveal a red satin microdress with plunging neckline and a pair of long legs which she then proceeded to put to good use dancing down into the audience and grabbing various people to dance with her for a few bars. I was one of those people!

It's probably not the qality of the song that makes it stick in my mind so strongly :-)