Okay, time is now 5.58 am 13th June 2007, i havent been able to sleep and have randomely come across your site, and being a sad bastard i decided to answer and write this post lol
My usual chat up line is: "excuse me, ill only be a minute, but can i ask your female opinion on something"
then i usual make something up like "whats a good birthday present, i can buy for my sisters 21st"
or "who do you think lies more? men or women?"
these lines actually work, as in you ask a neutral comment to get them talking(so that they dont think your hitting on them), then transistion.
In fact, im that sad im going to give you a run through of how i run it.
So first of i see a a girl i would like to approach, and she is with her friend. So with out thinking i approach her, and say "hey guys, can i get your female opinion on something, I can only stay a minute"
9/10 the girls will say sure. "would you date a guy who was still friends with his ex girlfriend"? The girls either answer yes or no. Then you reply "actually this is a two part question, imagine your dating a guy, and your going to move in with him, would you move him with him, if he still had pictures of his ex girl friend in the draw" and then this usually gets them chatting about relationships and ***. Then from there, you use some psychology and psychologically games :-) and between you and me, this stuff actually works, wikipedia PUA, (pick up artist) ;-)