I never realized even after 20 years of living nearby that there is such a large beach people community in and near NYC. I especially did not realize that there are 50s era beach camps/social clubs that families can belong to al along the southern shore of the island. I have mentioned the Malibu Beach club before but it's worth mentioning again because it is such a pleasant place to spend a beach day that historically, like Memorial Day, is a huge crazy mess> Nearby Merrick has lots of places to shop and eat, and there are snacks and refreshments and tshirts and stuff for sale in the beach camps themselves.
Points of interest
Boswell's Deli of Merrick
a good place for egg sandwiches or prepared salads for beach picnics. The coffee is downright awful though