Is group exercise growing? Why?

its a leverage issue. Trainers can get more per hour and clients can get cheaper rates. Why do one on one for $60/hr when you can train 30 people for $150-$300/hr depending on the class rate. I offer small group sessions (no more than 5) at progressively cheaper session rates. For example I charge $60/hr but if two sign up for the same hour it is $75 split between them, $60 down to $37.50 and my rate goes up $15/hr. win win