I have been to a couple of classes at a school hall near me so maybe not as full on as a gym setting but I love it!
I definitely find going with a friend so you can laugh at each other, takes that whole "Im doing exercise" bit out of it.
The girl who takes the classes is super hot, skinny and fit but she says "dont worry if you dont know the moves, dont worry if you dont look like me or the woman in front of you doing the moves, just keep moving and have fun"
I do feel very un-co sometimes and have to stop to concentrate on the moves which by the time I have it she has moved to the next set but I figure I will have them down patt one day as will you