There was a site similar to this in SF, HouseFed, but it looks like its down now. Another variation here is Munchery, where the meals are actually made by chefs.

I love cooking and hosting meals at my place, but I don't actually want to meet new people through my meals or make money. Instead, I just want to catch up with people I haven't seen in a while in a way that doesn't involve drinking (the default around here).

But I find it hard to figure out who to invite for meals, because I'm not sure who's around on any given night, and I don't want to invite too many people, and I don't want to invite someone too many times (and have them feel bad for having to say no so much). I wish I could just say "tonight I'm making X, come over if you're interested, reply by X so I can buy appropriate portions."

I've tried using G+ circles and Facebook lists, but everyone's on different networks and has different rates of response.

Anyway, that's my problem, would love an app with a solution. :)