Our office only takes up half the floor in a building of mainly full floor offices. This was a similar arrangement to our last building. And, like the last building, I noticed a particular phenomenon: bathroom tourists. People come from other floors to use our bathroom. They can access them because they're in a common hallway, unlike the dedicated floors. I never do, but I always want to call them out, or at least charge them a resort fee.
There is a central corridor in my building, which was once a children’s hospital. People with offices in the wing opposite mine routinely use the bathroom in our wing, despite having an unoccupied one in their own wing. Meanwhile, my colleagues almost all use the restrooms in the basement, despite our offices occupying the top floor.