As further validation that the ’70s weren’t as awful as we thought, Jamiroquai nestles up to the art-soul influences of Sly Stone, Rufus, and others withReturn of the Space Cowboy(Work/Columbia). The Fender Rhodes is back with a sweet vengeance, as are syncopated grooves and horn-lined riffs played by humans, not samplers. No idle nostalgia broker, Jamiroquai is a funk-making machine with a bright future in the past.B+