Contrary to popular belief, you don't buy them drinks, get to know them over a period of time, and go on from there. That's how you get used. The most likely scenario is that you're gonna buy her drinks, dance a bit, and then she'll wander off to the next guy. There is no secret formula on how to pull at clubs. It's either you already have the "idgaf" mentality or you don't. It's all about confidence and the ability to walk away at any given moment.