So they'd think it was her roomie in the stall.
If you view it in the context of an 18-year old girl who'd been raised in those halcyon days when modesty was actually considered a virtue, it might make more sense.
She was just making a joke to illustrate her discomfort; I guess (not for the first time) I failed to make myself clear.
At times when I go out to music joints, the convention now seems to be unisex restrooms - only one person at a time but either gender.
I honestly don’t know how women put up with this. Especially as the night wears on.