I did the audio guided tour of the Ventas bull ring in February. Though I am not in favor of killing animals for sport, I must say that I was impressed by the ceremony, spectacle and excitement surrounding a bullfight. You get to walk around inside the ring to appreciate the spectacle and the audio guide gives good and interesting details about the building and bullfighting in general. The tour includes a photo (10Euros) of each visitor inserted into various bullfighting backgrounds. Very amusing for your friends back home.