Time Out says
One of the most legendary karaoke bars in Madrid. A great way to end a crazy night out is going to this place, which stays open until 6 am on weekends. However, it's quite difficult to find (located at the entrance to the underground parking in the Plaza de los Mostenses). It will never be empty on a Friday or Saturday. Early in the day, you’ll find fans singing along to the songs of their favourite bands, and as the night progresses, young people wanting to give singing a try before heading home. Their drinks also leave you with a good hangover.
Plaza de los Mostenses, s/n
|Transport:||Plaza de España (M: L3, L10), Santo Domingo (M: L2)|
|Opening hours:||Mon closed; Tue 10pm-5am; Wed-Thu 11pm-5am; Fri-Sat 11.30pm-6am; Sun 11pm-5am|