I'll nerd out a little here - a couple of weeks back I saw Os Mutantes at Third Man Records, who are considered generally speaking one of the seminal acts in the Brazilian Psychedelic/Tropicalia scene in the late 60s/early 70s. Sergio Dias, lead guitarist and singer, is clearly not at 100% physically and has a lot of mobility issues, but the man can still play and he still clearly loves to play his songs. Weird stuff and obvious hipster bait: I told my friends I went with it was probably the highest concentration of advanced degrees the city had seen outside a Wayne State seminar hall.