Just wanted to give kudos to the gym for handling a wretched situation, with the dad of students nefariously trying to collect bathroom video, very well. Good to know what happened so folks can be aware of this 'forgot my backpack' technique and what to do

My kids do take classes here, and will continue to do so - I have even more faith now that they're in good hands.
http://www.bethesdamagazine.com/Bethesda-Beat/2017/Chevy-Chase-Man-Accused-of-Placing-Hidden-Camera-in-Kids-Gymnastics-Center/ or
http://wjla.com/news/local/police-father-hides-pinhole-spy-camera-in-bathroom-of-silver-spring-gymnastics-center