I'll chime in here. I think many guys have different methods that work for them. As for me, If a girl is checking me out and i look over and we keep EC, i smile a bit and im not sure how to explain it but i have one of those left arched eye brows that if i smile i goes higher than my right lol sounds strange i guess but that gives off a sign like "oooo heeyyy" and the girls like it. so i may say something to open up and if she smiles or laughs, im in and i ask for the number and to hang out. All the girls i ever dated said i have a seductive type of approach where i wont just ask for the number or whatever but mostly make a comment about her smile and make her blush. When i met my recent ex, Man my game was pretty damn strong, i used to make her smile so much that one time she ran off into the bathroom because she wanted to hide her huge smile. Even recently, My best friends girlfriends friend, Hot brunette, i gamed it smoothly and she was smiling so much that she put her head on my chest because she was smiling so much. My ex of a LONG time ago i remember my game was on the rise i made her tear from the "sweet things" i would say lol. Anyway... Keep the mood light, if you approach cold, See her reaction, get a feel for a girls look towards you. Is she smiling? is she making strong EC? Is she glancing over at you more than twice? did you make quick EC with her and she gave off a quick smile? if so,.. go in and say Hey and if shes feeling it... should be no problem as long as you keep it cool.
