I'm terrible at flirting. With this one guy I really liked at the petstore, both of us would talk about geeky stuff, or our snakes, and then conventions and stuff, then wed make a sexual innuendo and look at the floor and kick our feet. We were both awful. But we both grinned like idiots at each other. So I guess, my way is really just picking on them. I pick at him for stuff, then I tell him I'm better at him at gaming, we talk about similar interests, and I basically grin like a complete idiot and avoid eye contact.
So as I said, I'm bad at flirting. But, I did in fact give him my phone number, although Sapphire had to write it down for me, and I handed it to him and bolted out the door because I was nervous he'd laugh at me. I'm assuming my body language does it for me, because my lingo and my attempts at eye contact suck.