I've be doing pick up for about a month now, & Im not bad.

I always get a cell number, for me, its easy, I just ask. But, I want to start getting numbers WITHOUT asking.

i.e. I want her to Want to Give me her number.

What are some good, ways/lines/set ups for this?

I suppose you can go about it in a couple of different ways: you can build a lot of attraction and then say you have to leave, at which point if she's attracted enough she'll want to see you again and give her you number/ask for yours; you can do the same but with comfort instead of attraction; or you could use gambits and lines like "I've got to go, what steps can we take to continue this conversation" or "I have to leave. If only there were some way for us to stay in contact. In this great technological age you'd think there'd be some way..." (On that one you can hold your phone as you say it if you so fancy).