So I went to a bar a few days ago and saw a gorgeous female bartender. I caught her multiple times staring at me for a few seconds and smiling or trying to gain my attention. I tried to start a small talk but it was a busy Saturday so it was impossible to keep a normal conversation. I had to leave so I told her that I'd love to meet her again under normal conditions and gave her my number written on a napkin (didn't ask for hers in case she had any problems while working). It has been 4 days but no text yet.
I taught bartending at the largest bartending school in the world. One thing we always mention is to be friendly. Smiling at customers is the right thing to do for your employer...and it is the right thing to do for yourself. It gets you bigger tips.
There is a chance she was coming on to you, but it is a miniscule chance compared with the chance that she was just doing her job as a bartender.
Most women I know seem to think that a guy giving them his number is a turn off. Seems a bit arrogant.