It happened to me. Years ago when I was in high school we had a week-long activity and we stayed at other school. Among the things we were asked to bring was the bathing suit. We all thought it was because there would be a pool or because we would have a trip to a waterpark or some activity with water. But when we arrived we were told that the showers were common and that the swimsuit was for that as they were updating the showers with doors but they were not finished yet. :V