(Illustration by Paul Dilakian/Getty) The spin class at the New York Sports Club near City Hall was a popular lunchtime workout for landlords and real estate attorneys. They would go for the intense instructor, Mitch Kossoff, a spinning evangelist and one of New York City’s most prominent landlord lawyers. Mitch Kossoff In the studio, Kossoff cranked up a soundtrack of thumping club music, motivating his class to “dance on the bike” as they worked up a sweat. In his law practice, too, Kossoff made adversaries perspire with an encyclopedic knowledge of the state’s byzantine rent stabilization and loft laws.