The Harbor Fitness gym holds classes in each of its centers at Park Slope Gym, Mill Basin Gym, and Bay Ridge. So, if you’re on the go a lot in Brooklyn and want access to multiple gyms, Harbor Fitness could be close by. They frequently update their website with class schedules, so you can always join them. Harbor Fitness offers one-on-one boxing sessions too for people who want their privacy.. You can also choose boxing classes that last for 30 minutes or an hour.

Harbor Fitness

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