Need help, girls please answer!?

Ok so im a 15 y/o guy, 5-9, and not to sound pompass but ive been told im pretty good looking. Im fine in the girls department, ive had a good amount of long term girlfriends and all that, but my friends and i are going to a 14-17 high school club in two weeks. Im not really amazing in the hook up area coz lik i said, mostly i date girls that ive known for a while and really care about. Ive gone to dances and met new girls, but we were only dancing/ grinding so i didnt do bad at all. But at this place ill be expected to meet girls, get their numbers, and even make out, which is what my friends who have been to this place said goes on. Lik i sed, asking girls who iv never met to dance im fine with, cuz i feel lik i wont see them agen so wats the biggy. Here if u dnt at least get som numbers and get someone to make out, u apparently got "no game." i dnt want to look lik a loser in front of my friends if i dont get somewher with a girl. Im confident in my abiliy to, but im no sure how to go about it. Wat if they say no or something. In this case, im piking up a girl iv never met, which im fine with, its just foreign territory is all. So as girls, wat wud get u to giv a guy ur number or even mak out with him if hes pretty good looking. Wat wud he hav to say/ do? Wat shudnt he say/do? Thanx i appretiate it