Apparently it's mandatory to arrive 10 minutes prior to class if it's your first time. The welcome email (which is quite lengthy) recommends it but does not state it's required. I arrived 5 minutes before and I was turned away. I called ahead of time to pay and no one instructed me to arrive 10 minutes early. Almost 20 years in the fitness business as a trainer, coach, owner and Kinesiology graduate it still didn't matter. I get it, policies, but they really need to get the staff in sync. I'm sure it's a great workout!