Alright heres my expanded bar game:
A bar is a place that people go to chill out and have fun. So what do you want to do when your at said bar? You wanna have fun. Stop caring about meeting women, or what to say. Go to the bar with the intentions of having fun with friends or by your self (what ever your preference).
So now your at the bar and having fun. Basically, if you see a set of girls walk up to them and talk. Yes catchy openers are awesome for the most part. But in a bar they really are not needed. UNLESS, you are opening a mixed set. Which sometimes you need to do but from what I've learned is that if you look there really are alot of sets of just girls. I really like what sly said! That will work with mixed sets. In a mixed set you really just wanna open the group and then AMOG the group. Tell a funny story, get the set in a good mood and laughing. Find your target, neg her alittle but dont show her too much attention. once she is wondering why your not showing her attention, acknowledge her alittle then Isolate. But if its just a set of girls, you can pretty much walk over and say hey if you want. one of my favorite things to do, is walk over to a table of girls and just sit down with them. then say something like "im sorry but me and my friend were arguing and he doesnt believe how gay he looks in that shirt, he looks gay right?" at least something to that effect. something silly that can start a convo. or even, "hey, i gotta smoke a cig can you watch my beer. ive been roofied before and id be okay with you doing it" or say something as simple as "hi,I'm bardu". a bar is a place people expect to meet people, the more girls you talk to the more numbers you'll leave with.
Another great way to Meet Girls at a bar is outside in the smoking section. the one reason i like that you cant smoke inside. Usually its only one or two girls outside smoking together so it already broke up the set and you dont need to worry bout opening a mixed set. Outside while smoking, IF YOU SMOKE, you can say to a girl with a big sh^t eatin grin on your face, "you kno smoking is soo bad for you!"
I also agree with DR.keith, social proof in a bar is absolutely the best thing you can have going for you. When i go to a bar i always introduce myself to the bouncers, and continually say what up to them when walking out. lets put it this way 2 times to a bar i never need id to get in again. but women notice this, they see a guy walking off the street, skipping the lines and not showing id. he must be popular, he must be high on the social ladder, i want to know him. the other people to know are bar tenders. if its a pub that has alot of regulars you can get to know them to, and eventually when you walk in everyone will be saying high to you and vying to say what up. you are now god in that bar and every girl will wonder who you are that you know so many people. however bouncers should always be first person you should introduce your self to. they provide the most social proof possible!
the best advice i can give you is to get outa your head, and stop thinking in just sarging terms. go out to have fun, go out to enjoy your life. if you make meeting girls a priority your wasting your time. like i said, have fun, talk to anyone and everyone, and bring social proof to the table and you will meet girls.