Regress to childhood with skillfully concocted mugs of hot chocolate, courtesy of this downtown canteen. Owner-mastermind Maury Rubin will serve a different flavor of his intoxicating cocoa every day during February. The lineup hasn't been announced yet, but previous years' highlights included Earl Grey Tea hot chocolate, a delicate blend with notes of bergamot, and Sunken Treasure, an indulgent cup with submerged caramel coins and chocolate truffles.