I had a great laugh over this, just some music geek humor!

C, E-flat and G go into a bar. The bartender says, "sorry,
but we don't serve minors." So E-flat leaves, and C and G
have an open fifth between them. After a few drinks, the
fifth is diminished and G is out flat. F comes in and tries
to augment the situation, but is not sharp enough.

D comes in and heads for the bathroom saying, "Excuse me.
I'll just be a second." Then A comes in, but the bartender
is not convinced that this relative of C is not a minor.
Then the bartender notices B-flat hiding at the end of the
bar and says, "Get out! You're the seventh minor I've found
in this bar tonight."

E-Flat comes back the next night in a three-piece suit with
nicely shined shoes. The bartender says, "you're looking
sharp tonight. Come on in, this could be a major
development." Sure enough, E-flat soon takes off his suit
and everything else, and is au natural.

Eventually C sobers up and realizes in horror that he's
under a rest. C is brought to trial, found guilty of
contributing to the diminution of a minor, and is sentenced
to 10 years of D.S. without Coda at an upscale correctional
facility.