Gawked at During Orange Theory

I was at an Orange Theory class in Lower Queen Anne, which has big windows facing the sidewalk. A man came and stood at the window and was staring/making suggestive faces at two women who were using rower machines by the window. The women were clearly uncomfortable and moved off the machines to try to be out of the man’s view. The instructor went over there but didn’t do anything at first. I was about to go out of the class and say something to the man but the instructor finally closed the blinds. It’s just really saddening that women can’t even seem to exercise in peace.