As a monologuist David Cale can create a dozen nuanced characters in a single evening. But playing a single part in a chamber musical he wrote himself--alcoholic former country-western star Floyd Duffner--Cale replaces nuance with vacant stares, expressionless singing, and a cartoonish dumb-hick drawl. As his semi love interest, aspiring young singing sensation Clea, neophyte Faryl Millet contributes an almost adequate voice, undergraduate acting chops, and a fabulous figure. Too featureless even to be serviceable cliches, the pair slog through prefab sentiment and laughable improbabilities: neither of these crack musicians can muster more than two weak chords on the guitars they cart around. Jonathan Kreisberg's quasi-country score is pleasantly forgettable, and director Michael Wilson's clunky, inert staging makes the two-hour show look and feel like an early rehearsal, a handsomely designed insult to intelligent theatergoers everywhere. They'll love it in New York. Through 5/8: Tue-Thu 7:30 PM, Fri 8 PM, Sat 2 and 8 PM, Sun 2 PM. Sun 5/1, 2 and 7:30 PM. Goodman Theatre, 170 N. Dearborn, 312-443-3800 (TTY 312-443-3829). $20-$30.