I've not come across this myself, but there is some information about classes on their website, if that helps: tinyurl.com/ybtyxmf
Yeah, they gave me an information sheet. I wanted to know if the classes would tone me or help me lose weight (I'll be honest, I'm after the latter) and the women behind the desk couldn't help me. I feel like either she needs training to better help people, or they need to loosen their rules a little. She'd already told me that I didn't need a membership for one class a week, but I felt like this tactic was all about money-grabbing, not what was right for me.
I've got my classes sorted. The instructor I spoke to was really helpful. It took three minutes for him to run through the classes with me.