In Barcelonetta there is a hole-in-the-wall tapas bar that reveals no indication that it is one of the top 25 stops to make for gourmandes. It is noisy, unpretentious, and full of locals. There is an upper-case "R" for "Relais" discretely placed above the heavy wooden door, but beyond that there are none of the usual trappings: the silverware and napkins are of the cafeteria variety; there is no linen; there is no wine list, on the contrary, the only wine on offer is poured from a casket. The kitchen is an open grill managed by the abuela, the staff are the children, and the maitre'd is probably the father. My recommendation is to grab a place standing at the bar and start ordering because if you insist on waiting for a table, they might close the door before you get seated. They are famous for their bombas and all of the seafood is seasonal and fresh. Today's specialties were grilled gambas, razor clams and artichokes to die for. 

Highly recommended. Open daily for lunch.