Writing 324, via Roxanne

Reggies Sandwich Factory
Barrie, Ontario CANADA N6E 1R7
Women's restroom, 2nd floor

have you found that sex lately has been a pain in the ass?
well turn around! you're doing it the wrong way!!

Written below:

NO YOU'RE IN THE WRONG BATHROOM

The meaning is obvious, however these were stalls known for sexual conquests.