The few female bartenders I "know" will hook me and maybe one of my friends up. In a large group I usually am the only one she'll take care of. I flirt like crazy though, and try to hit the same spots.
Usually I go to more low key laid back places where the bartender can actually hear you and have a little time to chill and talk with you.ey
There's also what I call the cleavage tab comp. This new girl I've been seeing has some spectacular D's (yes, I'm bragging....insert motorboat joke here) and it's amazing what those things get us when we're out. I love it.
One really cool bar that was downtown used to comp EVERYTHING. No matter how many people were in our party or what we drank. We tried not to abuse that because we wanted it to last, but alas, they went out of business

(I wonder why????). Even the first night we went he waived our bill. I argued with him, but he insisted many times. I figured it was a matter of new bar, first nights free, please come back and pay next time. But he would never take our money.
God I miss that place!