I am, too.... AND, I'm wondering what happens at a spin class (since I've never been to, or seen one).

I did buy a basic trainer to which I affixed one of my bikes this Winter. I try to ride that thing daily for about two hours. I vary cadence frequently, and stand and spin for one or two songs worth every 1/2 hour or so(classic rock in the earbuds encouraging me to keep a high tempo).

What goes on in spin classes at a gym that I'm missing out on? That is ...OTHER than those tight yoga pants