I'm no expert but here is what I would have done:
You say: I'm impressed on how good you are with this kind of advice, would you mind going out for a drink sometime so i can pick your brain some more on that subject... if she says yes then ask her for a number....
or you can go there tomorrow and continue gaming her... show her that you are a persistent guy who doesn't take no for an answer.
I went to my first day mall sarge today and i managed to pick up a cashier at a jeans store. I didn't do the number close but she was giving me a lot of IOI's (my wing told me that, i'm still a RAFC) but now i know I can number-close next time I see her. It's not like she's gonna run somewhere

)
Just be patient, it's all about having fun with it.... and having fun just as a goal... but the fact that you wanna bang her that's just a side effect
