Step 1: Seed the conversation with something fun you're doing later on in the week. DO NOT invite her or in any way hint that you intend to invite her.
Quote:
Hey, I know this awesome comedy club downtown. All the acts are either amazingly good or amazingly bad -- either way you can't stop laughing. I'm going to go on tuesday night with a few friends, it should be a lot of fun
Remember, AFCs would invite her at this point, but you're not an AFC, right?
Step 2: Continue with unrelated conversation for a few minutes
Step 3: Bring up the activity you talked about in step 1 again, and tell her she should come.
Step 4: Take out a small piece of paper and tear it in half. Write your # on one half, and pass her the blank half and the pen. She will know what to do, the whole point is to not actually ask for the number (doing so may trigger her AFC-defense responses like "I don't give out my number" or "Why don't you just give me your number").
Step 5: When she's done writing down her number, tell her to draw a picture of herself so you remember what she looks like.
Step 6: Trade pieces of paper with her so you have her number and she has yours.
MUCH better than some other # close methods, because you actually make plans to see eachother while you have built up attraction (as opposed to making plans days later over the phone).