Taberneros was in the old days a spanish tavern, also called "tasca". My description for a "tasca" would be a local bar, where you can get some small portions of food, between dirty and casual. In comparison to a bar, here we normaly get offered wine, instead of beer, Coca-Cola or coffee.
At Taberneros they wanted to have a great selection of wines and serve great quality of food. And so they did. The refurbished the restaurant, keeping the initial brick walls, painting all furniture in a sparkling red and instaling their wine cellar behind a glass wall at the back of the restaurant for everyone to see.
The food is tasty made with localy sourced products. Nice foie terrine on fig bread, daily sourced fish dishes, slowly braised meet and a great cheese platter.
Although Spain is an important wine producer, it is not that easy to find in Madrid nice wine bars.
Well, this is my recommendation.