I happen to believe that if a I happen to believe that if a private business owner asks us to wear footwear in their establishment, then we should wear footwear if we want to go in there. (boo, hiss, boo, hiss, I know) If we don't like it, we can protest, petition, and plead our way to change. (Board can help out in this area, since he knows a lot about it.) Here's why I think it can be dangerous to run barefoot on a treadmill... I was running on a dreadmill at the physical therapist's office barefoot, when I looked away for just a moment, lost my perception of where I was on the belt, and slid my foot along the metal side of the rail that lines with the belt. I cut my foot open. If I were a suit-happy pig, I could have turned around and sued them. At the same time, I think if we could carry a waiver to say we will not sue if we get hurt while on their premises barefoot (from being barefoot, then everyone will be happy. I actually don't see a problem with people going barefoot on the indoor track though. Like Abide says, point out that they let people in the Pilates and Yoga classes go barefoot; why not the runners? Now if they want to say that athlete's foot is such a problem, then they should also force people to wear flip-flops while showering at their gyms.