"Wrong party"?
All right, this might be a trivial thing to get caught up in, but that's what happens when you have an, er, "alternate lifestyle" -- you begin to see it everywhere, as if wishful thinking.
After Keaton's character asks the woman in the phone booth if she'd like to marry him (we see her shake her head) he goes back out of the booth, turns to the other two, and says, "Wrong party."
Forgive me my ignorance, but was that a way to say that she wasn't interested in men? Or did that mean something completely different?