Two things are certain - our experiences will always be unique, and they will always be free.
Aside from those two guidelines, these experiences can be anything. You should go into every Bodies in Motion with an open mind and excitement, dropping your expectations at the door.
You'll sweat, you'll have a blast, you'll meet new people and re-connect with old. You'll have a few hours out of your day to be present and in the moment, and experience something new.
Really, what else do you need to know?