For all you guys out there having trouble getting number closes here's a tip i learned from my time as a salesmen. Don't ask yes or no questions, they leave from for yes or no answers. Instead of saying "Hey, you're cool, can i have your number?" which leaves room for her to politely excuse herself and say no thanks, say "hey, whats your number? you seem like fun" its a closed ended question with only one answer and leaves very little room for her to maneuver out of it. You'd be surprised how willing people are to give their information out instead of feeling rude or awkward. Also works with dates too, instead of saying "hey wanna go out sometime?" say "hey, lets go out next week, there's a (insert, party, bbq, resturant opening etc) and I'd love to take you." Instead of asking for permission which seems desperate it implies confidence, that you're a man who knows what you want. Anyway that's my little tip and its helped me get multiple dates with girls who people would consider out of my league. thanks