Sweat buckets.

National yoga chain with many NYC studios and heated rooms. New students get a free week of unlimited in-studio classes.

Gym chain with cardio and strength floors and group classes. Free one-day pass for first-timers, booked online.

Running club for LGBTQ+ people and allies. Weekly fun runs in Central Park and Brooklyn are open to newcomers and guests.

Free club with 20+ group runs a week, mostly from McCarren Park in Williamsburg/Greenpoint, plus social runs and volunteering.

Public running tracks in city parks, many a quarter mile with all-weather or rubber surfaces, for sprints, endurance runs or speed walking.

Low-cost chain gym with cardio machines, weights and free in-club fitness training. Nine clubs in Manhattan alone.

Free NYC Parks fitness classes in all five boroughs: Zumba, dance fitness, yoga, mat Pilates, bootcamp and more, led by instructors.

Jiu-jitsu school on West 14th Street. First day is free for tri-state residents, including a 45-minute intro lesson for newcomers.

Western Queens running group with free weekly runs in and around Woodside and Sunnyside.

Boxing gym on Bleecker Street with 45-minute group classes: bag work downstairs, ring work upstairs, plus sparring classes.

Boxing gym on 125th Street with trainer-led sessions and open gym. It trains fitness boxers as well as amateur and pro fighters.

Indoor cycling classes ridden to themed playlists in the dark, at many Manhattan and Brooklyn studios.

Drop-in adult dance and fitness classes at the Alvin Ailey studios, from Horton and ballet to hip hop, West African, Zumba, dancehall and vogue.

Bouldering-only gyms in Williamsburg, West Harlem and the Upper East Side. No experience needed.

Circuit strength and conditioning class at a Gowanus CrossFit gym, open to all levels with no experience required.

Climbing gym in Long Island City with bouldering and rope climbing, plus beginner classes like Intro to Climbing and Learn the Ropes.

Four-floor independent gym in Williamsburg with personal, semi-private and group training. Sells single day passes.

Long Island City climbing gym, formerly The Cliffs at LIC, with bouldering, rope climbing, yoga and fitness, plus intro classes.

Manhattan club with HYROX-style circuit classes, 24/7 open gym and personal training. Intro week for $50.

Dance cardio and sculpt classes; the signature class is 35 minutes of dance cardio then 15 minutes of mat sculpting.

Brazilian jiu-jitsu and Muay Thai academy near Penn Station, with programs for all ages and experience levels.

Hot yoga studios in the West Village and Williamsburg (formerly Modo Yoga NYC), offering heated hatha, vinyasa and Pilates-yoga core classes.

City-run indoor recreation centers with exercise equipment, gyms, indoor tracks, fitness and dance classes, and (at some centers) indoor pools.

NYC-based chain offering 50-minute full-body classes on the Megaformer, a reformer-style machine with springs. Studios across Manhattan and Brooklyn.

Recreational adult leagues and pickups (volleyball, basketball, soccer, kickball, pickleball, softball and more) at venues across NYC. ZogSports is now part of Volo.

50-minute small-group, low-impact resistance classes on a Pilates-style reformer. Many studios in Manhattan, Brooklyn and Queens.

45-minute dance cardio classes mixing easy-to-follow dance moves and HIIT, with a live DJ.

50-minute interval classes alternating treadmill running and floor strength work, led by a coach.

Large bouldering gym in Gowanus with climbing, a fitness area and daily yoga classes. Formerly Brooklyn Bouldering Project.

Climbing gyms on the Upper West Side (West End Ave) and in Chelsea, with day passes and classes for all experience levels.

Long-running Brooklyn boxing gym. Programs include Muay Thai, Trans Boxing, fitness boxing for seniors, a Parkinson's class and a chess boxing class.

NYC's LGBTQ+ and ally volleyball league, with year-round drop-in open play, seasonal division play and coached clinics.

Harlem running community with group runs, walks and run/walks on Monday nights, Tuesday mornings and Wednesday nights.

Brooklyn running club with group runs most days, mainly in Prospect Park. Prospective members are invited to trial runs.

Former Blink Fitness gyms, rebranded as PureGym. Many are open 24/7 with weights and cardio, across all boroughs.

Nonprofit Ys across the five boroughs with gyms, pools and classes. Day passes sold at branches; scholarships available.