All about spreading positive vibrations and dropping rhymes like “I just wanna do the best I can do,” The Pro Letarians adhere to old school hip-hop traditions. They rap over tracks such as The Beatles’ “Let It Be” and “the Jackson 5’s “I Want You Back.” On their new mix tape, Not All of Me Shall Die, the duo experiments with R&B vocals (“Triumph”) and gangsta rap (“Tried”). Local opener Chris Black just self-released his new disc, Welcome, and will premier his new backing band for this show. (Jeff Niesel)