If you have people who are interested in helping and take-charge kind of people, have them be the “leader” of the exercise at their station. Make sure you take them aside and give them proper form review and tips, and also make sure you keep control of your class and use them for visuals & motivators for the others primarily. It can help with the flow, proper form and technique, alleviate any confusion and also help with equipment setup / usage. you can’t be everywhere at once or they’d have cloned you! Have fun!!!