Girls:Do I just simply ask for your number?

If it were a girl you liked, then maybe you could go up to her and just chat. Next just be friendly, and definitely be yourself. Girls hate posers. If she really likes you she will show it by smiling a lot or twirling her hair. Then this basically gives you the OK to make a move. I suggest saying something like, "So, can I call you sometime?" or "Do you want to hang out sometime. I could call you." Most likely a girl would say yes because she would probably enjoy going out with a guy. Just don't be too pushy and you'll be okay! Hope this helps!

I think you would have to have some kind of conversation to see if getting that persons number is worth it.
Your not going to just walk up to a pretty girl and say "Hey can I have your number". For all you know she could be married or boring or Not interested in you at all.
Try a conversation and you'll know more or less if she's going to give you her number.

If you are having a nice conversation, you'll be fine when you ask and she'll be more than happy to give it too you.
If you flat out ask for it without talking a getting to know her a little first, she might be a little hesitant to give it too you.

If a guy is cocky and full of himself don't try but if ur nice and we get along yeah why not?