On the days I pick up Aitch from school, we sometimes hang out at the playground for a half-hour or so afterwards. He plays while I chitchat with the other parents. I find it strangely awkward to be in a social situation where I am on a “nodding acquaintance” basis with so many people. It’s easy to talk to people you know; it’s easy to ignore people you don’t know. What’s hard is talking to, or ignoring, people you sorta know.

There’s one group of kindergarten mothers there who are very good friends. I think of them as the Mommy Posse, or the Mosse. They’re not the Mean Girls; you can walk up and join them, and they’ll be perfectly friendly. (I want to be clear on that; I can’t stand how whenever more than two women are in the same room, people start using words like “catty” and “cliquey.” I participate in a lot of groups — book club and the dog-walking group and the movie night contingent — and all of them are perfectly civilized.) It soon becomes evident, though, that the Mosse is tightly intertwined, and it’s hard to join the conversation when it’s all about what they’re doing that evening, or after soccer on Saturday, or for brunch before church on Sunday. They’re not trying to be exclusive, but they are friends, whereas the rest of us are just other mothers who happens to be standing in their vicinity.

At times, I’m envious of the Mosse. It would be nice to have a permanent group of friends, and for the boys to have permanent playmates. Imagine: we would never have to go out of our way to arrange a play date (something I’m bad about doing in advance) or a parents’ night out with another couple. We would always know what we were doing on the weekend.

On the other hand, the Mosse seems like a commitment I probably couldn’t handle. That’s a lot of Cheever-esque suburban togetherness. Let’s be honest: I wasn’t good with exclusive social groups in high school, and I’m probably not any better with them now. I have my groups, as noted above, but I don’t want to hang out with any of them on a permanent basis.

Do you have a Mosse? If so, what are the advantages and disadvantages? If not, would you join one if you could, or do you consciously keep away?