I'm so tired of the sexism at the gym.

I'm getting annoyed about it constantly and I have only been to the gym about three times. Tonight, my husband was in the locker room and a man walked in and said, "Oh, I'm so sorry." My husband said, "No, it's okay, I'm going to change." It makes me mad. I'm going to the gym and none of the women seem to be doing the same for my husband. I know it's hard to control how other people act. Recommendation?