Just from reading different threads its just the feeling I get.
People don't answer the door or their home phone.
It has to be also be pre-arranged for anyone to pop over. My cousin came to deliver something today, no idea she was coming, happy to see her and invited her in.
People don't seem to like other people in their house, I was at a friends party last week. They were still up at 7am, I fell asleep and ended up staying the night - didn't ask and it wasn't a problem. I think this would horrify some.
A "girls night" seems to be viewed as rather childish.
If a partner has friends over it seems to have mutual agreement that this is annoying.
I could be very wrong and happy to be told so.