My daughter absolutely loves being a part of a cadre. It's fun to watch. I think as a kid I was really rather solitary. (Maybe I wasn't and it's just my fuzzy memory.) Even as an adult, I really prefer my ratio of solitary time to heavily outweigh my public or group interaction, but with kids--mine anyway--she makes me meet my neighbors, and socialize with complete strangers. All in all, it's probably pretty good for me.
Kids are full of life and naturally reintroduce their parents to parts of it that they have forgotten.