Puns are great.

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 5th between them.

After a few drinks the 5th is diminished and the G is out flat. An F comes in and tries to augment the situation but is not sharp enough. A D comes into the bar and heads straight for the bathroom saying,"Excuse me, I'll just be a second."

An A comes into the bar but the bartender is not convinced this relative of C is not a minor. Then the bartender notices a B-Flat hiding at the end of the bar and exclaims, "Get out now! You're the seventh minor I've found in the bar tonight." The E-Flat is not easily deflated, comes back to the bar the next night in a 3-piece suit with nicely shined shoes. The bartender who used to have a nice coporate job until his company downsized, says, "You're looking sharp tonight, come on in! This could be a major development." This proves to be the case as the E-Flat takes off the suit and everything else and stands there au natural.

Eventually C sobers up and realizes in horror he is under a rest. The 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, the C is found innocent of any wrong doing, even accidental, and that all accusations to the contrary are bassless.