Sorry my bad English, this is not my native language!

In some European countries are different rules about how old children may be present in the opposite locker room. Mainly there are problem with too old boys, mothers sometimes bring their schoolage sons with her to women’s locker of swimming pools, because they don’t want to let them be alone at men’s locker room. This will lead to little girls and their mothers protest. The foremost thing is that a 10-year-old girl would not want to be with a boy the same age such as after swimming in the shower room naked.
But opposite situation is very rare – only few fathers will bring their daughter (if they are not very little children) to the men’s locker room. Anyone can understand this situation as a improper, because certainly some man will be stare at girl, as in women shower nobody will stare boys, only they are afraid of about their own daughters.
And now I wanted to tell about absolute exception of this rule, which happened in one small European country in one small town (only 8000 persons living there). I don’t even know, is it possible for some other European, maybe more tolerate countries, to find 13-year old girl alone (!) in men’s locker room, shower and sauna at swimming pool.
This little town has quite big swimming pool, used in winter by many persons also from neighboring towns.