Greenwich Avenue: Locally owned Countdown Fitness has plans to open a new studio on Greenwich Avenue. To date, owner Anel Dzafic has operated his company mostly from Rick Stebbins Performance Therapy in downtown Greenwich, which allows personal trainers like Dzafic to use its space. Dzafic’s Countdown Fitness workout emphasizes high-intensity exercises done extremely slowly. The workouts last for 30 minutes. Dzafic said he’s collaborating with designer Robert Passal of Putnam & Mason, near the top of Greenwich Avenue, to create the studio. He expects to open in September.