Not a seat to be found in these Spin classes!

Go to the Reebok Gym on Columbus Avenue on the Upper West Side; try a Tuesday night, a Saturday morning or sometimes a Sunday morning; get there 3/4 of an hour before the scheduled Spin class of the instructor named Marc, and maybe, just maybe, you'll get an assigned bike for his notoriously-packed class.

Why is it that these classes "sell out" almost an hour in advance?  What's so special that demands a guard at a registration stand outside the door and a steady waiting line of wannabes, hoping for a no-show?

Marc Selden, practicing attorney, except during Spin, with his trade-marked music tracks and wild, steady chereographed cycling treks, makes this sold-out phenomena happen. 

Ask anyone-the spinners, the guardians at the gate, the wait-listers-they'll tell you that  you'll covet that bike,once you get it.  Just get there early.