How do you approach a girl for a dance in a club?

I plan on going clubbing soon with a few friends for a fun night out, and I was wondering if someone could tell me what the appropriate method

for approaching girls to dance or ';grind'; is? Now I realize that when I'm around girls in that situation I don't want to come off as a creep and that I want to appear as confident, but I'm not sure if there is a middle ground for doing this. The Last time I went to this particular club, which is where my friends and I are going to, I always asked the girls if they wanted to dance in a courteous and straightforward manner, but I was rejected about eighty percent (most) of the time. I'm not going there to hook-up with or hit on anyone, but I want to have a fun time, without coming across as a creep or being kicked out. To put this in a very blunt way, I want to dance with girls, however, I don't want to come across as a creep or spend most of the night standing on the edge of the dance floor sulking. I would like straight, simple answers that almost tell me step-by-step what to do, and I would also like it if people didn't give me condemning and sarcastic answers either. Thank you.How do you approach a girl for a dance in a club?
Make sure you're dancing, not just chilling against the wall acting skeezy. Try to make eye contact with a girl you want to dance with and smile. If she smiles, go for it. Just come up and start dancing near or with her, and try to make some conversation too so she's not freaked by a random stranger suddenly grinding on her.

Another technique is to dance a bit with a lot of girls and just kind of work the room. That way everyone knows you're out to have fun. If at all possible, bring some girls as friends tonight to the club. As a girl, I'm far more likely to dance with a guy who showed up with guys and girls--it shows that he's cool enough to have girls as friends, so he must not be a total jerk or loser. Good luck!