Got thrown out of my step-dad's 24 hour fitness once (tried to train while visiting). The "trainer" told me my squat form was way too dangerous (I was deadlifting!!!)
And that a. lifting in bare feet was dangerous (there's that word again!!) and b. I would have to leave if I didn't put on appropriate footwear.
I'm glad I wasn't trying to do Fran without a condom, or something similarly unsafe :biggrin: