Ladies' room. Maybe
It's different for men, but here,
CUT OUT THAT GRUNTING.
Seriously, I try to play nice in the womens' room. I'm a very considerate person when it comes to public restroom etiquette, from cleanliness/auditory/olfactory angles, and I expect others to extend similar courtesy. I don't want to LISTEN to the sound of you trying to poop, particularly if you're punctuating it with AUXILIARY noises coming from your THROAT. Really.