As a club owner where both freestyle and choreographed classes are offered, I prefer the choreographed classes–I know what the instructor is teaching is safe and effective and they have had to go through rigorous training before they are certified to teach. This means I don’t have to spend as much time monitoring the classes. The members prefer knowing exactly what type of a workout they will get and it will be exactly the same no matter who teaches it, and although they still have their favorites, there is less anxiety for “subs”. I sometimes worry about the freestyle classes (i.e. Zumba) because I don’t know exactly what they are teaching and if it is safe. Also, I find freestyle instructors more about themselves and their own popularity and don’t encourage participants to crosstrain.