I always seem at a loss when asked to play Happy Birthday. I used to play with this crazy tenor whod blow a scorching version over Bflat rhythm changes, and Ive played it over minor blues. I try to treat it as a real song with differing results, sometime its fun, other times its a chore. I wonder what others do with it. I can imagine some folks refuse to do that stuff but I dont mind in fact I get a charge how touched the birthday person reacts, not to mention it seems a guarantied $20 tip .