Why are exercise classes mostly women?

And where are the men?
I recently tried 3 different classes at the Community Center. These are not Pilates or Zumba or dance classes which I figured would be 100% women. These these are strength and toning classes. All three used weights and one used weights and weight bars. I figured they would be mostly men. Nope. Including me, the ratio was 35 women 2 men, 24 women 2 men, ~28 women 2 men.
After the third different class I asked the instructor, if there were any classes with men. She said “No. They don’t come. Ask your buddies to come with you.”

At those F:M ratios I feel that I look like a creeper. It’s silly but I feel uncomfortable.
Where are the guys? Are they dead? working? embarrassed?
Do any men here attend exercise classes?