*Sigh*...hands off handlebars while standing, that's just not correct form. Enough said, I won't harp on it !!

Re: music though, I feel like we are genericizing these group fitness classes so anyone can teach them with little to no experience/training/style (ie, pre-programmed CDs and choreography). It's frustrating as I believe a good instructor is like a choreographer -- they know how to create music which suits the moves and they make it exciting, interesting and fun.

My 2 cents