Hi, AFC here. I met a girl today at an info-session for one of my school's clubs (which I have no intention of joining actually). We talked for about half an hour when I felt it was time to leave. However, I didn't know how to #-close so I was trying to prolong the conversation as long as possible, in hope that she'll say something suggestive (yes, stupid me). Anyway, during our conversation, a friend of hers (a guy) budged in to our conversation and started chatting with her. I felt uncomfortable and didn't know whether I should've stayed or left, and since I felt I've been there long enough, I did the latter. In hindsight this was really dumb as I didn't get her contact at all (just the club's) and it made me seem really beta. I'm walking past that area again tomorrow so if I do see her, I'll try to strike up a conversation with her again, only this time I need to be able to #-close! Help seddit, what should I say to this girl?

EDIT Btw, is if ok to ask her out even when her friends are there?