[tag]Jay-Z[/tag] is not retiring again. Or he is not retiring. In fact he went to Brooklyn to give fans an early listen to some of the music on his upcoming album, “American Gangster.” Jay-Z, along with a full band, performed several tracks from the album inspired by the upcoming Denzel Washington-Russell Crowe flick. “American Gangster,” in theatres Nov. 2, chronicles the rise and fall of notorious Harlem drug lord Frank Lucas. The artist said that…