Speak for yourself, as I definitely plan to have a social life and be meeting women during grad school. I mean, why are you worried about where to meet people? That part is going to be pretty much the same as in undergrad or any other stage in your life (which is not particularly easy, but it's also not particularly difficult). Yeah, sure we all might not have a lot of free time, but that's the case for many people who still meet members of the opposite sex (or the same sex if that's your thing). Besides, why did you make it sound like you are "stuck" with PhD Econ students? There will be people in other departments, working on various masters degrees, PhDs, JDs, MBAs, etc. Not to mention undergrads (unless you feel that's off limits for you) and not to mention people you meet who aren't in college (such as recent grads). In my own personal opinion, meeting people is mostly about someone's personality, social skills, etc. So if you usually don't have much trouble meeting women, then don't sweat it, I'm sure you'll do just fine.