Is It a Good Idea to Ask Out Your Bartender

So over the past couple of weeks I've become a regular at a bar near me. I'm friendly with the bar manager, DJ, owner, etc and I really like it there. The thing is I'm really attracted to one of the bartedners. He's cute and cool and we chat when I'm there and always exchange a hug\cheek kiss when I leave. I'd really like to ask him out but rejection could ruin a good thing. Plus I'm not sure how much is him being friendly and how much attention is trolling for tips. Any advice would be much appreciated.