A drummer
HEY! Jrs. a drummer, and he's pretty darn good. But the other boys in the neighborhood wanting to start a band tell him if he doesn't have a drum set by his birthday (which he will, but not because of them), then he "can't be in the band."
Of course, none of them actually play an instrument at all...
Makes me wanna whack 'em with a stick.
How does that work?? How can it be a band if they don't play instruments?
Drummer jokes are pretty much synonymous with banjo jokes, aren't they? (And viola jokes, accordian jokes, and to a certain extent, bagpipe jokes...)