Many friends are obsessed w. spinning studios like SoulCycle and Flywheel here in NYC, where they pay per class. Skyfit is taking a similar model for running and cardio classes (at home on treadmill or elliptical).
Also reminds me an earlier hunt of Pelton (http://www.producthunt.com/posts...) which offers a connected spinning bike for home use via live streaming classes.
Polywork