Flatiron Group Fitness
Group Fitness Classes in Flatiron, Manhattan
Train in a dark, high-performance boutique gym environment with cycling, HIIT, boxing, yoga, kettlebell, turf and tread, Pilates and barre, and cardio dance classes.
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Why Grind House Group Classes are Different
Grind House combines boutique studio energy with serious training structure. Our Flatiron classes are built for members who want variety, intensity, and a professional environment without the soft edges.
Choose Your Grind
Book by modality, build a weekly rhythm, and train across strength, conditioning, mobility, and cardio.
Claim Your 3-Day Trial Pass
Start with the 3-Day Trial and experience the class lineup at Grind House Flatiron.
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