What should I sing for karaoke at a Biker Bar?

Last week, a friend dared me to go to a biker bar. We both thought, for sure, that I would be killed. I played a little pool, and had some shots and decided to do karaoke. I did "Disarm" by the Smashing Pumpkins and "Turn the Page" by Metallica. Everyone loved it, and asked me to come back...but what the hell should I sing? I don't know what they'll like and continue me not being dead...