Crazy Mocha, Carnegie Public Library, Oakland.
A library employee approaches an acquaintance in line for coffee:

Staff: Oh, do you work here now?
Patron: No, I’m just getting a cup of coffee.
Staff: I see. A cup of “Joe,” a cup of “Java,” a cup of “mud.”
Patron: Yeah.
Staff: So, what’s your poison?
Patron: … Coffee.

— Submitted by pudhaus