Nice tapas terrace
It is a terrace in a very nice district of Madrid (near "Bilbao" metro station). I has very good tapas, and it is not too expensive: 20€/person aprox.
It's great in summer, I don't know how it might be in winter, but definately different.
espectacular
It is a very nice terrace to have a drink at night, but it is very expensive (14€ a drink). Is is worth going at least once, to see the incredible views over Madrid in a really nice modern atmosphere.