Greg Hatza, organ Peter Fraize, saxophone Brian Kooken, guitar Robert Shahid, drums In 1994, Greg met Joey DeFranscesco who told him the Hammond B-3 was enjoying a popular renaissance. He formed the Greg Hatza ORGANization and has been performing and recording on the instrument non-stop since that time. With the trend towards more advanced electronic keyboard and rhythms now, Greg adapted to the trend, switching from the Hammond B-3 to the electric keyboard and piano.