At the school fitness center I used the Spin Bikes like 2x before someone other than a work study student noticed. They were not happy at all to say the least. I was told that they are dangerous because you can't stop pedaling and I could get hurt. Which was ironic because the bike I rode to the fitness center with also does not allow me to stop pedaling; they didn't care.
On a side note, I suggested to a girl I work with who loves Spin classes that she should get a bike and she thinks it would too boring. I find Spin Class boring, its no windtrainer boring but its no open road.