A fifth e-state would only obtain in A key.

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: 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 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 naturel.

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
diminuation 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 wrongdoing, even
accidentals, and that all accusations to the contrary are bassless.

The bartender decides, however, that since he's only had tenors for
patrons, the soprano out in the bathroom, and everything has become alto much
treble; he needs a rest -- and closes the bar.