Dadjoke my local leisure centre has a women’s change, a men’s change and a number of completely seperate floor to ceiling family cubicles for parents of children of the opposite sex to use. These are great for both special needs and none special needs as they are equipped with systems to call for assistance, if required.
A real world example of a useful third space, as the title above suggests.
A couple of decades ago my then local pool went unisex (seperate showers, all cubicle change) and I was horrified when a man stuck his head under the gap between the cubicle partition and the floor.
Luckily, I had a towel wrapped around me, and being no shrinking violent (although not yet out of my teens) I shouted obscenities at him at the top of my voice until he ran away, afraid of being caught by staff, alerted by my shouts of ‘FUCK OFF, YOU FUCKING PERVERT’.
My friend, in the cubicle on the other side was already dressed, so after she realised what was happening she chased him out of the change and down through reception, alerting the staff, who called the police, who arrived long after the FUCKING PERVERT had fled.
I never swam there again and will never again use a facility that is only unisex. Not for me (and in my 40s, I bet I wouldn’t be nearly as appealing to sexual predators) and not for my children, girls aged 11 and 6.
I have an adult son with special needs and he has been raised to seek out single sex facilities for himself, to avoid accidenly making women feel needlessly threatened when they are vulnerable. His own challenges mean he is more likely to use single occupant unisex spaces than the men’s.
So, I see your changing room anecdote and I raise it.
Third (unisex) spaces are good for everyone, but only in addition to, not in place of, single sex facilities.