Walk NYC is a FREE program that encourages New Yorkers of all ages to get fit while enjoying the outdoors.
There are many locations in which you can participate:
Thomas Jefferson Park: Meet at the recreation center. Fridays, 11:00 am-12:00 pm
Jackie Robinson Recreation Center: Fridays, 6:30 pm-8:30pm; Saturdays, 9:00 am-10:00am
J.Hood Wright Recreation Center: Wednesday, 9:00am-11:00am
More details can be found here: http://www.nycgovparks.org/programs/recreation/walk-nyc