This treadmill-focused gym offers a serious one-hour workout. Two rows of clean machines line mirrored walls, personal overhead fans sit above every station, and speakers pump out an eclectic mix of music. (Think Marcy Playground’s “Sex And Candy” alongside house beats.) Good-looking instructors are a bonus. “Treading” can be tailored to individual needs—paces are set with beginner, intermediate, and advanced participants in mind, and “light” classes are offered. Each day of the week focuses on a different part of the physique: abs and arms, back and shoulders, glutes and calves, and full body. You can pay by the session or purchase a package, and the schedule covers mornings, afternoons, and evenings throughout the week.