Jess - First off
CONGRATS for joining!! You will be happy you did!!
The classes - well at mine you go in and get weighed first. If you are new you have to sign up and THEN get weighed. Then you sit in the class and wait for it to begin. Depending on how crowded it is.
The leader has a topic that she discusses and sometimes she gives out stickers for people who lost weight, etc.
It just depends on the leader really - but that is it. And if its your first time the leader should go over program at the end of the class for the "newbies". That is where she explains it in more detail.
That is the jist of it - people participate (if you want to) and give good suggestions, support, motivation, etc. Its very worthwhile.
I hope your leader is good - that makes it ever more fun! Mine is the BEST!!
Good luck and have fun!
Tara