RE: Bar strategy of yanking pants down...
No, no, no. While I like this approach, it's purely a drummer's approach, and only good for drunk, don't-even-remember-her-name sex. I think my earlier post of acting sheepish after you've bumped into her on a crowded subway may need to be re-thought as well, as it would be like a... well, rhythm guitarist's manouver.
I think what we need here is a bass-player-type manouver, elevating this whole game to an entirely different, soul-satisfying level. Just spitballing here mind you, and no, spitballing isn't one of my suggestions, whatever that means, but maybe we have to think outside the box here.
I'm thinking things like, posing nude for art classes, or something like that. Get her involved in a midnight swim, maybe, and don't pull on your pants or shorts when you get out of the water. There's gotta be a way, here, people! Accidentally drop an elephant-sized condom when you pull money out to buy her that whacky appletini drink... Help me out here. There HAS to be a way!