This is a goth dungeon, nostalgic for dragons and medieval armour. This dark space, covered in graffitti is really of interest only if you are goth / metal AND young, since you will barely meet anyone above 20-22 here. Wear anything but black and you will stick out. Constant heavy metal / goth soundtrack (at a comfortable voulme, though), fairly easy-going and friendly vibe (mind, they do have to at least look scary). They do Cubalitros - huge 1 litre cups of mixed spirits and mixers - 8 euros each.