I like this idea. Arrive late so that way there's plenty of people already there. Go in, do intros for a few minutes. Scope the place out for hot chicks. If you find some, hit on them and pay attention to ONLY them. If they leave, you leave. If no hot chicks, leave after about 15 minutes of chatting with people.
Update*
So I arrived about 3 hours late and it backfired on me. All the single girls were gone. The best part about the night was arriving and being greeted by her ex at
her new house. So I guess they got back together. The funny thing about the night was the obvious awkwardness between her and him when she would make a subtle flirty remark towards me. I've had a few so I'll be a little ****y here, I look about 5X better than this guy. Probably smarter than him too. Though I think his income is higher than mine and that might be the deciding factor for this broad. Anyway, I've known this broad is good for nothing. And I've spent very little time trying to attract her but goddamn it really irritates me that I was SO close to banging her. Her body is outstanding and if she would've wise up, we'd be having amazing sex for at least a few months.
If my theory holds up, keeping her around one way or another, I'll end up f*cking her. I don't give up so easily.