Doug E Fresh knows what the National Black MBAA conference attendees need after a busy day of seminars, meetings and exhibit tours — a good old-school party. The Atrium at 200 Peachtree became party central as the Atlanta Chapter of the NBMBAA laid it out with fine hors d’oeuvres, lots of special guests, live music,  and the host  with the most — master party maker, Doug E Fresh.