>> 9:30 Club has Editors, Ra Ra Riot, and Biffy Clyro. $15 tickets still available, and don’t miss our full preview of Ra Ra Riot by clicking here. >> Michael Powell’s 1969 erotic drama Age of Consent features a young Helen Mirren in her film debut. Screening for free tonight at 7 p.m. at the Library of Congress’ Pickford Theater. Call (202) 707-5677 by 4 p.m. to reserve a seat. >> Malcolm MacPherson covered Ambassador…