To lose weight
Total Body at Shred415
Huff and puff your way through alternating 15-minute intervals of walking, jogging or running on the treadmill mixed with weight-lifting “breaks.”
Chaos at On Your Mark
Your mind and your muscles will both do the work at OYM’s aptly named class: Go for a five-minute ride, a five-minute run, do ten strength-training exercises and start over.
BOSU Boxing Fusion at Soulistic Studio Spa
This 60-minute fusion class packs a punch—quite literally—with a circuit rotation of kickboxing, boxing and stability-enhancing BOSU exercises.
Kettlebell Fusion at Pure Vibes Fitness
Keep your heart rate up with cardio drills while sculpting your guns with the old-school kettlebell.
Pilates at Reform Chicago
We know. Another circuit training class? Clearly it works. Dedicate 55 minutes to an intense mind-body workout using the Pilates Reformer and focusing on your breath, your core and additional moves for a body-sculpting cardio routine.
CoreFusion Open at exhale
Channel the Zen of the exhale studio while building the muscles for washboard abs and perfectly sculpted glutes in this hybrid class blending Pilates, yoga and Lotte Berk Method techniques.
To get an endorphin buzz
Spinning at Flywheel
The 45-minute-long heart-pumping rides at this Gold Coast cycling boutique will clear your head and whittle your middle. The fab instructors and awesome music playlists sweeten the deal.
Tri-Tread at Equinox Loop
You don’t need to run a marathon to experience a runner’s high; you can enjoy one on your lunch break. Participants climb aboard treadmills for 45 minutes of hard-core, hurts-so-good intervals.
Boot Camp Conditioning at LA Fitness South Loop
Endorphin addicts, welcome to your happy place. Go all-out in this hour-long cardio class that requires you to lunge, kick, crunch and box your way through various workout stations. Then enjoy your exercise-induced buzz all day long.
To meet people
David Barton Gym
This River North gym features an in-house DJ a few times a week and even hosts parties for its members.
East Bank Club
The rooftop pool (that’s open during the summer, obviously) is more of a social scene than a spot for fitness buffs to swim laps.
Lakeview Athletic Club
This gym boasts a feature not common in many gyms: an indoor climbing wall. We’ve spied many members mingling while waiting to scale the wall.
To escape your small apartment
LA Fitness Loop
This workout facility never gets very crowded—perfect for pretending you have your own private gym.
VALEO at JW Marriott
Members at this exclusive hotel gym (it allows only 250 memberships at a time) get a monthly spa or fitness service. Spending time here feels like a vacation.