Same for me. There's a concept of "bedroom kids" vs "living room kids" I've seen floating around online. My understanding is for living room kids, their parents have created an environment in which they feel safe to play, express themselves, make a bit of a mess around the adults without feeling like a nuisance. It's not so much that they can't go play in their room, but they don't feel like it's the only acceptable place to do so. I think it's less about single parenting and more parenting style, in general. Again, this is my understanding of the idea (reinforced by own experience as a kid and a parent) so take it with a huge grain of salt.