Well, this happened last night at the open mike coffeehouse...

I was on stage with friends in the miniscule audience. We had been having fun all night with comments flying between the audience and whoever was on stage. I was noodling around on the guitar as the sound person adjusted the guitar mike when Charlie pipes up with a comment about the A string being sharp. Alison turns to him and in a loud voice says, "Oh right, this from a banjo player!" The audience laughed and when they quieted I commented, "What makes it even funnier is that his other crime is he also plays the concertina!"

Which brings up another one that I heard back a long time ago. We were at a festival and met a guy who played banjo and concertina. In talking to him we found out he was also a lawyer. Alison is not one to miss a bet when it comes to one liners. She looked him in the eye and said, "Then you must be the butt of all the jokes."