"Is there such a thing as a singles bar for sign languagers? If so, have you ever been to one and whats it like? Is everyone signing all over the place?"
Cute questions, indeed. :) What we like to do in order to have our own version of a singles' bar is we take over a section of a bar and chat away. The en masse of flying hands can be intimidating to waitresses and bar patrons.
There are three reasons for having our own singles' bar: 1) for deaf people to socialize, 2) for interpreting students (they're called that because they are studying sign language in hopes of becoming an interpreter) to help enhance their signing/comprehension skills, and 3) looking to get lucky.
Yes, I have been to one - that's how my wife and I started dating. ;)