Quiet sleazy.
Don not know the exact number, but it is behind a grey door ...
They have a jukebox on which you can select videoclips.
Open till late.

Post-scriptum: The above is rather an understatement. It is (or at least was ) the sleaziest bar I have ever been in, in Barcelona. It is a meeting point of all kinds of criminals: ranging from street thugs, to pimps, to east european maffia. It has quite a ominous atmosphere (think David Lynch), and while it's a good place when you still want more beer, it's not the place to make new friends (in whatever meaning of that phrase).