“Though his career has stretched from session musicianship to gris-gris psychedelia and supper-club standards, the music of Dr. John has never strayed far from its roots. And those roots have never been more joyously, bawdily or playfully celebrated than they are on this album. A sequel of sorts to Gumbo (1972), Goin' Back to New Orleans digs deeper than that collection did. If this isn't the defin”