Friend of mine lived in Madrid for a year or 2. Despite being a blue he has given this on bars in Madrid (although he moved 4 years ago)
"Bear in mind all my info is four years old, there aren't really any big chains. Best areas are Malasaña, just north of the main street and my fave drinking street in the world, no the universe, is Cava Baja, just south of Plaza Mayor.
Theres a bar for every 33 people in Madrid, to put that into perspective it'd be like there being 1000 bars in Formbyso no problem finding a bar but I never found any with big screens"