Well you are not too old, but I def understand what you're saying and I agree. I'm not attracted to people drinking in bars either. One of my musician friends is a long time nondrinker and he successfully plays in bars all the time, but I do know he gets tired of the drinking drama and the drunks. You will just have to see how it goes, but trust your gut and don't continue to do something if it feels like a waste of time or it's just meh.