Forgo your usual gym routine and head to one of these four NoVA plazas, where outdoor fitness classes give you a chance to enjoy the season without skipping a workout. National Landing hosts several free, outdoor fitness classes and workshops. Locations vary in National LandingEvery day except Wednesdays and Sundays, Fit4Mom hosts classes designed for moms to bring the kids along in the Mosaic District. Mosaic District, first class free, memberships starting at $99 per monthThrough November 1, The Plaza at Mason Square is hosting a range of free outdoor activities, including several fitness classes. 3351 Fairfax Dr., Arlington, freeHead to Boro Park for a free outdoor yoga class every other Wednesday evening.