Don't rule out marrying for money. (You can marry for love too, because there's plenty of rich people to fall in love with.)

For women looking for rich men, San Fransisco is the place. There are 12,000 more young straight men in SF than equivalent women, and that doesn't include Silicon Valley. Since you're reading Less Wrong, you're probably nerdy enough to pick up a socially awkward, but fiscally successful software developer.

For men looking for rich women, New York City is the best. If you're young and childless, you can enjoy dating women who earn 17% more than you and don't mind splitting the check. Because there are more college educated women than men in NYC, pairing with a career woman should be relatively easy.

If you're really ambitious, go to Hong Kong, Shanghai or Singapore. Expat women will move to these cities to advance their career, but often find it difficult to get a man. (Expat men prefer dating local women, but expat women practically never date local men) I've heard at least two reports of women resorting to traditionally male strategies, like buying drinks or counting the number of approaches they do.