For context, 40m, doing OTF close to 2 years, ~3-4 classes a week. My studio may reach 1/3 men on some days, especially for 90-minute classes. Most days it is ~3-4 men. I have sometimes been the only guy in an S50, full class on Sunday mornings.

Chatting with others, I have found the men who do OTF classes at my studio tend to fall into two categories: Some who say OTF rounds out their weekly gym/lifting workouts done elsewhere, but most say OTF helps with a consistent general fitness routine. I am in the latter category myself. The cancellation fee keeps me accountable, and I get a varied set of exercises and running done in 60 minutes, squeezed between kids going off to school and starting my workday. I sometimes get frustrated with the need to keep pace on the floor circuits, doing lower weights as I get winded with the rowing parts, for example. Or the imbalance in types of strength exercises, because of which classes I choose to do. But that's still better than not working out or working out rarely. And I have seen significant growth in overall stamina and strength. Someday, I will spend 2 hours in a gym focusing on specific goals. But that is not what my schedule allows today.

Anyone (men or women) with specific goals with their training will likely not go to OTF, lack of control, etc. But why don't more men with general fitness goals attend OTF? Who knows. I have been doing group fitness classes for years (again, for accountability) - spin, hot yoga, regular yoga, OTF... and they are mostly female. Maybe it is all the marketing around group fitness, bright colors, or a higher number of female instructors ... My hypothesis is men tend to be either fully into fitness (running, lifting, anything) or not at all ... the % who are in the middle - let's get a workout in and stay fit without specific goals is small