These are things I've heard at just about every bar gig I've ever played at.
Here's some from drunks who always come to the stage during a break.
1. "Hey I have a guitar and I've been practicing a little."
2. "My cousin plays a bass kind of like that..."(Usually I get the cousin's life story or how much better the cousin is than me)
3. "My dad has a guitar. I think it's a fender? It's pretty good."
4. "I'm trying to put a band together and I can't even explain how great I am on vocals!....."
---- Here's a few you always get from the crowd. ----
5. "Play some Skynard!" or "Freebird!" (I usually answer this with the middle finger and and say "NO CHARGE!")
6. "Do you guys know....
some obscure crapola!" (Why do people at bars wanna hear that song, that only they listen too? No one knows a B side cover of a Peter, Paul and Mary tune remade by Devo!)
7. Whatever genre your band is playing you always get the polar opposite in a bar. One night we were playing Nu metal with a band, we heard this after about an hour. "Do you guys know any country?"