Musical joke

I got this in an email forward so I'm not sure who to credit as author. Actually, I think I only got half the jokes but those more musically inclined may enjoy it even more:

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 a minor
and 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 developement." 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 DS without Coda at an
upscale correctional facility. On appeal, however, C is found
innocent of any wrongdoing, even accidental. The judge rules that all
contrary motions are bassless.