In a full-service room decorated with the bright colors of sunset over a limpid Caribbean sea, this veteran Dudley Square charmer delivers finely wrought traditional Dominican fare: savory turnovers and fritters, big simple salads, cutlets and fillets of pork, beef and chicken, beautiful seafood dishes and fabulous mofongo, many plates fragrant with the heady aroma of garlic. A short list of beers, modest wines and cordial-based cocktails, plus occasional live music, contribute to Merengue’s tropically festive atmosphere.