The Breadfruit & Rum Bar, the beloved Jamaican restaurant that closed its brick-and-mortar location before popping up inside Bitter & Twisted Cocktail Parlour for the past year, will serve its last meals there on Saturday. Owner Dwayne Allen’s beverage business, Big Marble Organics, has grown to a line of four bubbly drinks, including its flagship ginger beer that was created at The Breadfruit & Rum Bar…