>> OK, Joyce Carol Oates really IS going to be at Politics and Prose tonight, where she’ll read from and sign copies of her latest novel, The Gravedigger’s Daughter. Get there well before the 7 p.m. start time to stake out a seat. >> The Smithsonian Latino center presents From Mambo to Hip Hop: A Bronx Tale, a 55 minute documentary about how the South Bronx’ Boricua community makes its own brand of music…