Prefects' Bathroom

Prefects, head boys/girls and quidditch captains can all use the prefect bathroom.

There are about 24 to 32 prefects and head boys/girls depending on how many prefects also become head boy/girl. And there are also 4 quidditch captians.

So there are, give or take 30 people that can all use the prefect bathroom.

What are the chances they won't accidentally decide to go there at the same time? Or do all of them have a schedule where they sign up for a specific time? Or perhaps the bathroom can be used by several people at the same time, but it creates several seperate spaces? Or maybe not everyone uses the bathroom, and i'm overthinking this.

What are your thoughts on this random topic?