Shred for your life! If you are ready to witness ultimate badass-ness, or to test your two-hand tapping might, the sixth annual guitar battle is where you should be. Created by musician/artist Marc Razo, the contest has started a grassroots community where guitar players can earn shredding respect by their peers and even a few of music’s own guitar heroes. The part concert, part competition will have Andrew WK, Jaleel Bunton and Justin Theroux as guest judges. You can attend the battle on April 17 at Webster Hall. Tickets are $10. shredforyourlife.com.