Yes, I have done it 4 times, once in school, once at the hospital and twice in restaurants. I had no choice, school and restaurants: ladies' room was packed, as always, while gents' room was empty. It was a choice between peeing in my panties in full view of a bunch of women or sneaking to an empty gents' room and relieve my bulging bladder.
The incident in the hospital involved me crossing my legs,working my PC muscles full time to stop the pee from coming out, running to the ladies' room only to find it locked by the stupid janitor who cleaned it, so going to the gents' room was almost a reflex. I needed a toilet bowl to pee into, for god's sake, hahahahaha.
Besides, I love the shocked "jaw dropped to the floor" look of the lucky guy who sees me coming out of the men's room. Out of those 4 times, i was seen by guys twice, at the restaurants. One gave me the shocked look, while the other one just smiled politely (hrm, maybe that wasn't just a polite smile, come to think about it>. I just gave them a sweet smile and a quick "sorry, ladies' room full" line and a confident grand exit. 😁