Os Mutantes, which is Portuguese for “the Mutants,” is a Brazilian psychedelic rock band formed in the 1960s. The band underwent many lineup changes before breaking up and not performing for more than 20 years. The band reunited in 2006 and has been playing ever since. The Troubadour is located at 9081 Santa Monica Blvd. at Doheny. Tickets are $20 advance, $25 day of and can be bought online.