Want a girls number? After about 3 minutes of light conversation simply say. Give me your number. A statement not a question. Do this if you have to go. You can't be a little bitch about it. I have never failed to get a number this way. Sometimes they will say 'why?' to which you just say random bullshit like "because we are bff's' Or 'because we are good conversationalists and I want practice, duh'. Does't matter what you say but how you say it. Keep it light and have fun.