Ok so I usually hang out with a group of maybe 10 people or less when we hang out on the weekends, it's a usual thing. Lately we've been going to a lot of bars/clubs and I'm starting to get interested in one of the girls and i'm pretty sure she's interested in me too.
She's the type of girl who's really playful (i'm just hoping she's not like this to everyone but is doing it more with me).. Sometimes when we walk she grabs my arm (I don't know why I don't like it when girls do this to me though! Because it's not really a way in which I can show my affection to them, it's just them to me..i find holding hands way sexier :] ). So I got her number about 4 days ago and the next day she texted me asking what i was gonna do that night but i had plans already so we couldnt really do anything but we wanted to see each other; and we've also been talking on facebook quite a bit ..

Anyways to get to the point, since we've been going to bars and clubs a lot I need to find a right way to isolate her. Usually we're all dancing in a group but I need tips on how I can show her she's the one i want! My idea would be to tell her lets go to the bar and put my hand out so she can grab it and we'd go but then what? I'd buy her and myself a drink but I've read that guys shouldn't buy girls theyre interested in drinks! So wtff can I do? Does anyone have any ideas or tips for isolating girls at clubs/bars/parties? and what should I do to escalate once I've isolated them?

Also her birthday is coming up in 2 weeks and she invited me to DJ for it (she came to see me DJ at a club about 2 weeks ago and said i was amazing).. I think I should get her something, nothing fancy though because we just met each other about 1-2 months ago and barely are starting to talk more.. I really don't think she'd expect me to get her anyhting but I still want to get her a little anything to let her know I care.. not sure what thouuugh..

I need help and ideas pleasee, thank you!

DUDE WTF you are the one doing all the favors!!!! you are making it sound like ur the one who owes her. DJing at her party for FREE IS way expensive present for her. i dont think you should get her anything. dont be clingy. if u were gonna get her something get her flowers and a gift card. but advising you not to. cuz ur a DJ ur night is like 100$+ u are doing it for free DO NOT LET HER USE YOU. and do not be easy to get at least make her work for it

i'm not clingy at all.. i actually feel like she's the one putting more into "us" than I am.. but thanks!!

any advice on isolation?

Well it wont be easy to DJ and game. what i would do is grab her for a picture with the bday girl and be like 5 bucks just playful. Or if she's in a set most likely. open the set beg the target then ask the set "can i borrow her for a minuet... don't worry she will back back before midnight (playful laughter)". or you can say "hey come here i let you in on a secret."and say w/e funny and playful

That's exactly what SHE wants you to think!