To Don T. Yes, I went to the Nags Head in Battersea. Was it on York Road? If so it's now demolished (1980)as the previous posting notes. I saw Johnny Silvo, who is all over this thread, there in Autumn 1966. Sunday night I think.
On other nights, the same upstairs room hosted Kilroys Blues Club and I also caught Savoy Brown with the great Kim Simmonds on guitar there, a few nights later. Somewhere I've got a flyer which is probably worthy of framing.
On the same week's holiday from up here in the north-west, I went to CS House and paid 12/6d to see a bill that featured Carthy & Swarbrick, Shirley Collins, Anne Briggs and Bob Davenport. Blimey!!!! I thought it a fortune to shell out at the time, when I could go and see Zoot Money at Klooks Kleek for 7/6d! Had eclectic tastes then - still have 'em now.