At my gym its always just an instructor and some music. We have the Schwin bikes Sail Guy described. The best instructors are cyclists and the worse wanted to be a massage therapist (thank God she moved on). The best class I took was with an instructor who rides mtb. That class was awesome, I was the only one who knew what she was saying during the class.

I'm gonna try the 5:30 Am class on Wednesdays since I have school in the evening. Hopefully being up at the crack @$$ of dawn won't sour me on spinning.