spinning time

[Tjommies]

My previous posts regarding spinning time vs road time sparked a few comments regarding endurance on indoor trainer. I feel I get endurance on indoor trainer as I spin on average between 1h15 and 2hrs.  There has only been one time that I had a one hour session as I feel anything less than this is a waste.  I do intervals as well as high cadence spinning.  My spinning bike is setup in my TV room and I generally spin while watching a football or rugby match. Some of my buddies think I am crazy for pinning so long as they do it for about half an hour on average.

For the guys who spin more regularly than others, what is the average time  and what do you do during that session?