First off, I'm new here so I hope this is the right section.

My question is about getting a girls number. I'm in college, and I have no problems approaching girls, talking to one person. or a group of people. The one part of my "game" that sucks is my mid-game. I find that almost all my situations with girls that I meet are in groups. Either I'll be with friends or they are with friends.

I'm at a gigantic university so if I don't get a girls number that I've just met, I might not see even see them again. Or if I do it's like a month or more later. So how do you guys go about asking for numbers in group settings or where you're at a party, tailgate, football game, etc? I'd feel creepy or just awkward asking a girl for her number in front of everyone when my friends and I decide to leave or when shes taking off.

So basically, what should I do or look for if I'm trying to get a girl's number the first time I meet her?

Isolate. In situations like you describe, get the group talking about something, then start a quiet conversation with the girl and just slip her your phone. Also, get a signal going with your friends so that they know to distract the group and then get her number. I'd use a verbal phrase, just so you don't thow off body langauge.

Yeah just isolate. Tell her she needs to see something and pull her away whild your friends are talking with the group.

There's many ways to do this, many different gurus have different ideas on this. I think regardless of what you do you should isolate, as the other guys have said. The other key is that it is much better to get the number after you have developed some comfort with the girl. If you only attract and get the number, sure at the time the girl will feel like it's a good idea, but later she may experience a little buyer's remorse, or at least a feeling that, "I don't even know this guy, we barely hung out, why should I see him again?" It just makes her feel uncomfortable with the thought of seeing you again. You definately don't want this, build comfort.
Once in comfort (isolation), I personally prefer to use a line like this, "Well it has been fun hanging out, but I gotta go (usually only leave when you actually have to leave, or maybe if you feel that she is getting ready to leave, try to leave first) Is there anything we can do to stay in touch?" Now if you followed all the steps of the mystery method, by this point she certainly would want to stay in touch, and she'll probably offer to give you her number right there.
This is what has worked for me, but I am rather new to the game, so take my advice with a grain of salt.
Hope it helps.
-Prodigy