A blonde, a brunette, and a redhead went into a bar and ordered their drinks from the bartender.
Brunette: I'll have a B and C.
Bartender: What is a B and C?
Brunette: Bourbon and Coke.
Redhead: And, I'll have a G and T.
Bartender: What's a G and T?
Redhead: Gin and tonic.
Blonde: I'll have a 15.
Bartender: What's a 15?
Blonde: 7 and 7.