I've been blue collar my entire life, if I feel that God wants me to go to someplace like that to reach someone there is a reason, I have no issue being there, someone being in a bar doesn't make them a terrible person, not everyone there is drunk, sometimes people go to have a beer after work, and spend time with their friends, thats not a sin, the bible only says to not be DRUNK with wine, even jesus had the occasional drink of wine, the point is no one is sinless, except the man himself, so we have no right looking down on others because of where they are. Go reach people, spend time with them, you might end up finding a friend and leading them to Christ, true Christians don't look down on others because of where they spend their time