Photographer Drew Altizer goes to all the good parties! Drew reports in from Saturday's birthday party for DJ AM (Adam Goldstein, former fiance of Nicole Richie and just-dumped boyfriend of Mandy Moore) at Mezzanine, featuring not only the birthday boy himself on the turntables, but also Travis Barker (from +44 and the defunct Blink-182, as well as a former Paris Hilton fling and the back-on again husband of Shana Moakler, of reality TV fame).......