People that are in bars usually find there way to GOD eventually, The Clergy is not going to speed up the process any faster by being in the bar too...
Bars are EVIL!!!!!!!!!!!! In fact I once met a woman in a bar. And then we fornicated. Evil!
I take it that you are from a faith that believes that drinking an alcoholic beverage is a mortal sin. I am not. That said, I don't believe that anyone you'll find in a bar is necessarily more sinful than the average person you'll run into in public. I'm not as optimistic as you are that people usually find their way to God, but I don't think people who frequent a bar are in any particular danger just by being there.