Ask how her night's going. Ask her about her life. Listen to what she has to say and relate to it in some way or another. I've never really thought about it much like you just get talking about something and it leads on to the next thing which reminds you of something else.
For example I went up to the bar right next to this not bad chick and we were both waiting to get served for ages. So I said "This service sucks, I'm going around to the front bar". Then she's like "I will come with you". Then we were at the front bar and I introduced myself properly. She had some weird name so i'm like "that's an interesting name how do you spell that?". Then we just got talking about some other stuff and I ended up buying her a drink.
Anyway I didn't end up picking her up because I was already chasing another girl who was at the pub also. Obviously I should have gotten her number because the other girl I was chasing ended up being a bitch and went home early
