There are literally hundreds of ways to get a woman’s number. I will make this easy and brief for you, taking only time into consideration.
If you are hard pressed for time, like say five seconds, go in with a direct opener and aim straight for the number close. You literally can get a woman’s number in less than a minute.
Walk up and say something along the lines of this, “Hi! Look, I’d love to stay and talk to you because I think you are absolutely stunning, but I so have to get going. I have to get to the ball and home before the clock strikes midnight, so I’ll tell you how it goes tomorrow, so here. (hand her your cell phone)”
I made that up right off the top of my head at this moment, but this is the structure I use when I am hard pressed for time. Humor goes a long way in getting guards down. I recommend you check right then and there to make sure she didn’t give you a fake number. If she did, tease her in a playful way about it and say, “Don’t worry, I’ll only call you three times a day and six times a night for the next ten years. You can trust me! Besides, if I hadn’t done this, we would have never met.” Just keep pushing till you get it. I recommend talking to her on the phone right then and there as you leave just so she can hear you on the phone and you can build comfort.
If you have been talking to her for a little while; you can sense that she is attracted to you and you want to take the number now, talk to her about the coolest party coming up. Something else really exciting that you’re doing works well too and invite her to come join you. Tell her to invite her friends. When she agrees, tell her, “Cool! Alright, I’ve gotta get back to my friends now, but I’ll call you and tell you the details tomorrow.” Then hand her your cell phone. Call her right then and there and as the phone rings say, “There, now you have mine. Make sure you write Dan on your phone so you know it’s me and not some random dumbass that tried to pick you up.” Awesome.
If you played solid game and built lots of comfort and attraction, you can get the number any way you want. She will very likely want to give it to you by then. Just make sure you don’t supplicate and ask for her number. Always lead a woman through the relationship, never ask. If she doesn’t like what you’re doing, she will let you know.
The most advanced way of getting a woman’s number is by setting it up as though it was her idea. The way you do this is by leading her into doing something awesome with you and inviting her along, then letting her take care of the rest. “Yeah, I’ll call you. You can give me your number later.” And leave her for a bit. When you see her again, say, “Okay, I’m gonna get going now, I’ll see you there.” Start walking away. She will stop you and give you her number.
Remember, numbers aren’t everything. If you are having a very hard time getting numbers, it’s not that your skill at getting numbers is poor, it’s because you aren’t building enough attraction. Work on attraction first, then you’ll start getting numbers.
Good luck out there and have fun.