Playboy Playmate Dani Mathers: Creepy Pic Triggers Police Report, Gym Outrage

Dani Mathers is in a heap of trouble, because we've learned the cops are now involved over the photo she took of a naked woman in a gym shower.

We've learned LA Fitness has contacted the LAPD, after confirming Dani is indeed a member of the gym and the person who took the pic.

Dani posted the pic with the caption, "If I can't unsee this then you can't either."

A spokesperson for LA Fitness tells TMZ, "Her behavior is appalling and puts every member's privacy at risk. We have handled this internally and also notified the police."

The gym goes on to say cell phone usage and photography are prohibited in locker rooms, adding, "This is not only our rule it is just common decency."