Yes, that is one of the most venerated places in Madrid for Flamenco. Whether Blanca del Ray is as authoritative a flamenco dancer as they make out, we had no idea...but the remarkable number of US presidents, royalty, celebrities, dignitaries who have visited the place and specifically her filled an entire wall going back decades. Pretty impressive, and I remember the local people we do business with speaking highly of the place.I think that is a venue? I have also heard amazing performances in Almeria, and Roquetas de Mar, and Granada.