I have no idea. Unless I sit in the stairwell all day I can't see if others in my block are having visitors, I can't see any gardens from my flat so wouldn't see if people were having large gatherings, and I don't know who lives in any of the houses on my road, so wouldn't know if people going into them were from another household or not {and I can't see the houses unless I stand at at window so don't often see people going into houses anyway).