>> DC Arts Commission auditions for musicians who’d like to play outside metro stations start tonight, from 5 to 8 p.m. at Metro headquarters, 600 Fifth Street, NW, Washington, DC. >> Check out our Reader, Meet Author feature for a list of cup-runneth-over literary events for tonight. There’s Colin Channer at Vertigo Books, Susan Vreeland at Phillips Collection, Christopher Hitchens at Politics and Prose, and Irvine Welsh at Wonderland. >> The Rock and Roll…