Working in a bar can't be the problem, because you aren't allowed to drink while you're working. Go home as soon as you cash out.
The truth is, if you're an alcoholic, your problem is with you where ever you go. It's not harder to stop because you work in a bar. You would just be sitting on the other side of it otherwise. Or buying your vodka from the liquor store. You'd find some other reason why the pull is much too strong.