Since his self-titled 1990 smash debut, Dave Koz has been one of smooth jazz's greatest musicians. The saxman scored big on the radio and in retail even when he turned away from his established R&B/pop sound on 1996's Off the Beaten Path, which was done with more acoustic instruments. The Dance brings him back to the hard-hitting R&B funk sounds of that first album and its follow-up, 1993's Lucky Man…