Madrid does not offer many accommodation options. I recommend you stay at the b&b of the nearby Mine Shaft Tavern. You won't find it advertised on their website. You have to look for it and book it through Airbnb (Madrid Sunrise and Inn at MST Green). This b&b is adjacent to the famous restaurant and club with live music, the Mine Shaft Tavern: a typical biker club. The accommodation is well-kept and clean. Let me anticipate that current water has a strong smell and is not transparent given the presence of mines on-site. They say it to be drinkable ... I assure you that it will be just a little inconvenience: visiting Madrid will pay off.