Verified answer

Yes, every time, you're supposed too. Don't be a cheap skate

Yes, always tip the bartender. 1. they are providing a service 2. if no, expect crappy drinks on your next round

Yes, of course. Though do not over tip. I have had a bartender refuse a large tip.

male or female? Just kidding, if they get my drink wrong or give bad service, no, just like a restaurant

Yes of course. And it helps you get quick, speedy and friendly service.