I have noticed that when I am out with my friend in a restaurant, I always end up facing her and the wall, whereas she is opposite me and can see the other diners and main restaurant behind me.
The restaurant is small and a certain proportion of tables are up against the wall, where one person faces their companion and then the wall.
Once I arrived early and sat with my back to the wall, so I could overlook the main restaurant. She came after and seemed a bit put out about the seat but said nothing.
Do you try and get a good seat when out? Generally I don't esp, if out with a large group. I don't watch seating but if I am out with one or two, and I am always facing them and the wall. I do notice.
2 members of my family always do this,.