A very chatty Stephen Patrick Morrissey took the stage at the DAR Constitution Hall at 9 p.m. last night and watched the crowd go crazy as his backing band launched into the seminal Smiths hit “How Soon is Now.” He looked particularly dapper in a red blazer and dark pants. When the band completed the song, he told the crowd “Thank You. Thank you. It’s good to be back at the 9:30 club” in…