Jokes to make a theorist smile

A colleague sent me this one:

Musical intrigue at the bar:

A 'C,' an E-flat, and a 'G' go into a bar. The bartender says: "Sorry,but we don't serve minors." So the E-flat leaves, and the C and the G have an open fifth between them. After a few drinks, the fifth 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." Then an A comes into the bar, but the bartender is not convinced that 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 this bar tonight."

The E-flat, 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 corporate 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 naturale.

Eventually, the C sobers up, and realizes in horror that he's under a rest. The C is brought to trial, is 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.