La Trainera, Calle de Lagasca 60 (metro: Velázquez or Serrano), ☎ +34 91 5768035, [85]. A Madrid institution for decades, Trainera is an excellent but somewhat pricey restaurant serving strictly seafood dishes. They have a great wine selection and the waiters can recommend different vintages that will complement the food. Try the carabineros (giant scarlet shrimp) or the rodaballo (turbot). Usually closed in August.