Need a party remedy for the grey skies overhead? Disco + house music night PETROL celebrates its third anniversary tonight at Middlesex Lounge, enlisting New York crew Death From Above to keep the beat moving. DFA A&R guy and established DJ Justin Miller and the Juan Maclean crash Cambridge to help blow out the boogie candles, and resident DJs James Gerard, Greg Teves, and William John add some familiar flavor to the booth.