They can't find the key, and they never know when to come in.
or
Seven. One to change it and the other six to sing about how good the old one was.
or
Sorry, says the barman, we don't serve minors.
or
They can hit the high C's!
or
You Poke her face.
or
He was playing by ear
or
Everyone is relieved when the case is closed.
or
A 14-inch pizza can feed a family of four
or
Nobody cries when you chop an clarinet into little pieces
or
A Flat Miner
or