Head out to the Hudson for a chance to enjoy some time on the water, no reservations required, courtesy of Manhattan Community Boathouse at Pier 96 along Hudson River Park in Hell's Kitchen.
After you sign a waiver and strap on a life vest, climb into your kayak from the water-level floating dock and float away for 20 minutes. You will get wet, so wear the right clothing (and try not to drink anything)! Kayaks are available on Saturday and Sunday, 1-6pm; and on Monday-Tuesday, 5:30-7:30pm.
You can also volunteer to help out at the boathouse as well as become a member by making a donation of $20 or more.