I've tagged along with friends to various high-intensity workout "classes." (spin, treadmill, crossfit, etc). I never saw / heard form discussed at all. While

I've tagged along with friends to various high-intensity workout "classes." (spin, treadmill, crossfit, etc). I never saw / heard form discussed at all. While they don't military-style push you, it's definitely a more intense / semi-competitive environment. It's motivating to some, but I can easily see how new people or ultra-competitive people get injured. The classes are usually 30-50 minutes, they assume you know form already. With the teacher-student ratio they don't have time to show you anything. It's just start the workout and go. Most of these places have like a "new person" workout that they run once a week. It's not required and I suppose experienced fitness people assume it's not for them.