Huh. This is a pretty good description of how women usually act in locker rooms. "Ignore each other" is not quite right, either. Occasionally there is conversation. But mostly we just pretend that we are the only naked person in the room. But leaving things all over the bench so there is no room for the other person is definitely rude.

(I was a member of a British gym that had co-ed showers before going in the pool. I found this quite odd, even though everyone showered in their bathing suits/swimming costumes.)