Obviously, pickup lines per se aren't going to trick a woman into bed. However, if she;'s already decided to ride you nasty, you can still fuck it up with the wrong line. Conversely, the right repartee can establish that you're cleared for final approach .
I used to like to get a little conversation going, then ask "So, are you bi?" And then if she says "Yes", I'd say "Well, who isn't these days?" and carry on the conversation. If she said "No" I'd just look at her and say "You'd be cooler if you were." Either way, now we're talking about sex and what she's into, which never hurts your chances...