This thread............sigh.
I don't know how to break this gently.
This thread is at the same time an exercise in futility and a demonstration of why.
First of all, you're asking piano geeks how to pick up women? Why don't we ask pigs how to beat grandmasters at chess? Actually we'd have better luck with the pigs, because theoretically grandmasters CAN be beaten, whereas the chance of a piano geek picking up a woman are ...... well they don't exist. (I'm not trying to be insulting. It's just that we have to realize our limitations. To the extent that we are identifiable as piano geeks we CANNOT succeed at the casual pickup. But this is a two part problem: those of us with the least expertise of any known group are pontificating on the solution to an insolvable problem.)
But secondly, it isn't at first obvious why we are discussing pickup lines. We are discussing them, even though we know nothing about them, because we need them, because as a group we get so little action.
Strange as it may seem, there may be an answer.
Well, there are theoretically two answers. But one is unlikely to work. So here's the one that might.
Think about it, what two groups of people have more sex than they know what to do with? (I'm talking about ordinary people now, not celebrities and superstars.)
That's right, football players and bass guitar players.
Now, athletics are out. None of us have the genetic capability or we wouldn't be hanging out here.
But playing bass in a rock band takes about 5 minutes practice, and a few dollars in a pawn shop. Football players get about the same number of groupies, but they spend all that time lifting weights and smashing into each other. Bass players just show up, turn the amp all the way up, and play. And at the end of the night go home with whoever they want, not having had to pay for their intended's drinks.
I will note in passing that some rock bands include a keyboard player, and they do indeed get plenty of leftovers after the bass guitar, lead guitar, and drummer have had their pick.