when i used to go to an actual gym, i lifted in flip flops. and i heard the "what if you drop a plate on your foot" line so many times, it used to drive me nuts. relaly? like a sneaker is magically going to protect your toes from a 45lb plate falling 3 feet. anyway, when it came time for squats, deadlifts, snatches, etc, i just slipped them off and did them in bare feet.