Spouse, yes, after a fashion. Baby-sitting co-op... maybe in 5 or 10 years. I trust my players.

You jest, but for female players this is actually a viable strategy. I didn't meet my husband through D&D, but before I was married I met several boyfriends that way; and my D&D friends do, in fact, babysit our kids from time to time.

But, that's because of a specific feature of that game: it involves small groups of players. A larger role-playing game like a LARP can have involve more people, and serve as a source of meet-n-greets and internal favors.