no..no it doesn't! spin classes have nothing to do with riding a bike...
now a training stand at home with one of the grand tours on the tv does sound good...in a normal year the tour de france would be about to start...getting on the trainer for 4-5 hours a day watching the tour is great training...
Oh that's right you'd still have to ride your bike to the spinning class. By the time you'd get there, you'd be all smelly, stinky and sweaty.