H ere’s the scoop: Long Islanders loved Jahn’s, the chain of ice cream parlors with at least seven outposts here from the 1950s until closing down bit by bit through the ’80s. A single store in Queens is all that remains of the more than two dozen that dotted New York, New Jersey and Florida like sprinkles on a cone.

Its passing left a void. Unlike most ice cream shops today, with counter service only and virtually no seating, these were sit-down places for families and, especially, teens. Servers came to your table to take your order — whether for a simple sundae or the colossal Kitchen Sink, a communal concoction of every ice cream and topping the place had to offer. There was cooked food as well, but ice cream was the star.

"It had a very old-fashioned ice-cream-parlor vibe," said Ea

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