NY Luna Park at Coney Island Groupon Deal (seen May 2013) || $19 for Four Hours of Unlimited Rides and One Cyclone Ride at Luna Park at Coney Island (Up to $ 38 Value) in Brooklyn (Coney Island). || It's a good promo so we bought the groupon. Luna Park also does group discounts if you can organize 20+ friends. Price depends on amt of people and the day of the week you're visiting...see site for more info.
What to do and how to go on a half-day trip to Coney Island. A safe time to allocate for visiting the entire island would be 4 hours.