Sure on the road where you can coast. No coasting on these spin bikes.
I agree that it is boring….and not at all necessary….I have taken the one hour class exactly once. I went 30 miles.
If you can do 30 mph for an hour, you’re either Iron Man or the bike wasn’t set to emulate a real bike too well 🙂
This being said, given the right kind of road, you don’t HAVE to coast or rest up if you don’t want to.