Hey I just met you and this is crazy but heres my number so call me maybe(; HA NO as funny as that would be I wouldnt. Simply walk up confidently and say hey i couldnt help but notice how pretty you are! And then she will be all flattered then be like Could I call you some time then get her number. Don't be nervous, if you look confident and do this she will think Wow I like that. (: Trust me Im a girl and I know. good luck!
the first thing you do is DONT just say what your number alot of guys do that to me and i said No first you just have aa conversation with her talk about soming interesting then at the end of the conversation you say whats your number cutie trust me it works