This examination of dark comedies of the 1970s focuses on films which concealed black humor behind a misleading genre label. All That Jazz (1979) is a musical...about death--hardly Fred and Ginger territory. This masking goes beyond misnomer to a breaking of formula that director Robert Altman called "anti-genre." Altman's MASH (1970) ridiculed the military establishment in general--the Vietnam War in particular--under the guise...