For me, I make eye contact but don't make it a really conscious thing.
The biggest thing I do is make the guy laugh. I can make pretty much anyone laugh, but I do a little happy dance inside whenever I make "the guy" laugh.
Also, I use my traveling experiences & other things to talk to him about. I've been told multiple times I'm interesting, so basically for the first few times, I'll only talk about the things that people in general think are interesting.
And this is going to sound funny, but I can tell when a guy is wearing Axe. I really like the smell of it. So, if I REALLY like the guy, I'll say, "Hey, are you wearing Axe?"
And if he says no (it really doesn't matter if he's wearing it or not) I'll say, "Oh really? Because you smell really good!"
My methods sound cheesy, but believe it or not, they fall for it like no other. Not fall in the sense of that I'm playing them, just they're drawn to me. Haha.