The longest-running play in American history is also musical theater's cheesiest self-parody, a sweet, dumb story about two fathers who pretend a Montague-and-Capulet-style feud as an excuse to keep their kids, Luisa and Matt, apart. The hope, of course, is to throw them together, since children never do as they're told. When Matt and Luisa fall in love, the fathers arrange a "rape" by the mysterious Spaniard El Gallo, with help from a pair of feckless old actors. Matt is then supposed to rescue Luisa from the Spaniard and become a hero to her as well as to her dad, thus ending the feud. Not everything goes as planned, and the rest of the musical deals in schmaltzy terms with love's dark underbelly. The Fantasticks premiered in Greenwich Village in 1960 and played there until early 2002. The S.F. Playhouse, for some reason, is reviving it. Bill English plays El Gallo in a mustache and black Spanish suit; Louis Parnell plays one of the fathers, Hucklebee; Katy Stephan plays the spoiled but charming Luisa; Mark Farrell plays the nebbishy Matt. Parnell and Farrell are both solid professionals, putting in an honest night's work, but English and Stephan tend to be self-conscious actors. The difference is that Stephan can sing. Her voice soars and melts with emotion, especially in the duets, while English makes up for his limited range with a sort of prancing silliness. Joe Bellan and Graham Cowley manage real comedy as the geriatric actors, but director Dianna Shuster has no clear comic vision for the rest of the scenes, and The Fantasticks, overall, gives off an unfresh odor, like something that's spent too much time under stage lights.