In every major city, there are street musicians. With Granada being a focal point of young, wayward hippies (or college dropouts with rich parents who want to experience something real), you’ll find bands of gypsies and thieves among the narrow streets.
Call it “local flavor”, but be wary of your belongings. It’s a great opportunity for pickpockets, some of whom are in cahoots with the musicians.
Here’s video I took on this Santana meets Os Mutantes collection performing on Calle Cetti Meriem in the city center.