Okay. Since were "sharing...."
I went to study in the men's bathroom at college. I was sitting in the outside sitting area of the men's room, thinking it was the women's. After a few men came thru, looking at me strangely, I realized what I had done. The next day...this was in the college library...sev of the same men came back! and eyed me curiously. I was then sitting outside the men's room, adjacent to the women's.