What a surprise!  We are in Boston, and in particular, in a hotel on Copley Square.  This afternoon, about 5:30 p.m., this guy on a bike pulling a piano, stops in the middle of the square and starts to play!  He was an excellent pianist and played a wide range of pieces.  We just came back from dinner, it's 9:15 p.m. and he's still there!  If I were REALLY nosy, I'd go ask how much he has in the bucket as donations!