Come hungry to this 70-year-old Manhattan institution with its antiques-shop-meets-ice-cream-parlor decor, just like Marilyn Monroe and Jackie Kennedy used to. Hearty burgers, sandwiches, mac ‘n’ cheese variations, and other crowd-pleasers fill the colorful menu, but desserts are the thing to get; it might actually be against the law to leave without sampling the trademark Frrrozen Hot Chocolate.