Share 'Music Joke'

I don't know if you've heard of this one, but during a music analysis class today my friend read it and I have to share it. How funny do you find this joke? 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…