Today only: Groupon New York is offering $27 for a $50 Golf Ball Card and Club Rental at The Golf Club at Chelsea Piers ($54 Value) for a limited time. To get this deal, head over to Groupon, select “New York” and enter an email address. Deal expires August 12, 2010. The The Golf Club at Chelsea Piers is located at Pier 59, 23rd St. at Hudson River Park, New York, New York 10011.