This is still a bit buggy, which I am polishing and hunting to squash.

If wanting lets say to prioritise specific places to gather, or not, defined rooms space can be useful. If I recall correctly, in The Sims 3 there was possible to lock doors from certain Sims. But that another level of filtering, considered to be added in future. First I need door 🙂

Another thing is, items like furniture and whats not, also can be assigned to rooms. So if lets say house has two fridges. One in the kitchen and one in bedroom. Certain characters can priorities fridge from their room, rather common space like Kitchen. Imagine kind of students accommodation, or some motel kind of buildings. You don't want other characters wander into your fridge, if there is one in the Kitchen 🙂

All that will be further possible (at least that is the aim) to define in Lua, so will be flexible in terms of modding, what and who can access what.