Unisex bathrooms, maybe....
...but unisex showers? Oh, those Europeans! Frankly, given that anyone seems to be able to walk through any door and sleep in any bed they choose (and not necessarily alone), it's surprising it takes the Scoobies (what is that en español?) so long to unravel the mysteries at this school.
Also, how exactly does Héctor manage to buy that palatial building in the first place?