I haven't and can't imagine I ever would, but that's only because the whole bar/club scene doesn't appeal to me. The few times I've gone to bars were when I was dragged along with friends. It's not a place I'd go to meet people for a relationship because it'd seem somewhat disingenuous to me since; if my sole purpose in going to a bar was to meet someone, then after I'd found someone and decided I liked them well enough to get involved with them I'd have to reason to desire to frequent those places anymore, whereas they might not have been looking to meet anyone but were there because they liked that environment, that lifestyle.
So, provided you're both at the bar because you enjoy drinking, playing pool or darts, watching sports, listening to the music, dancing or whatever, then there's absolutely a chance of it developing into something more, because you share that common interest. And that's how you should go about meeting people for dating/relationships: engage in activities or join groups where you're doing something you love, not necessarily looking for someone but letting love find you as a possible relationship develops out of shared interests or hobbies.