I busked in France (Paris and the Riviera) in the early 60s. I played the bagpipes and my pal played guitar. We used to walk past the cafes playing and if we got a good response (clapping) we would turn back and play for ten minutes or so and I would continue playing the pipes while he took the hat around. I suppose what I'm saying is that a gimmick helps plus good entertainment. What wonderful memories!