The Gruta '77 concert hall is considered a true lung of the Madrid "underground" scene, where the most transgressive national and international rock come together. A room considered Cultural Heritage of the city of Madrid.

Monday: 11:00-02:00 / Tuesday: 11:00-02:00 / Wednesday: 11:00-02:00 / Thursday: 11:00-02:00 / Friday: 11:00-06:00 / Saturday: 11:00-06:00 / Sunday: 11:00-02:00