Shape Up NYC offers more than 175 free fitness classes every week at locations across the five boroughs to help New Yorkers shape up. Zumba – Saturdays, May 5-September 19 – 11:00 a.m. – Enter at 125th StreetYoga – Tuesdays, June 5-July 31 – 5:30 p.m. – Enter at 125th Street (Bring your own mat)Yoga…