Maybe the disco-era stamina to stay up all night and watch it. An immortally nutty 1979 dud starring then-hot Exorcist girl Linda Blair, Roller Boogie (late Friday/early Saturday at 3:45 a.m. ET, Turner Classic Movies) airs as the second half of this week's TCM Underground double feature (following 2 a.m.'s equally non-terrific yet also perversely watchable 1980 flick The Apple, about a futuristic devil-ruled world marked mostly by glitter, fey boys and bad accents).

Boogie is basically an old-time MGM musical -- bored rich girl meets eccentrically talented poor boy, yada yada yada -- put to a disco beat on wheels. (Oh, Xanadu, where art thou?) At least you get to hear Earth Wind & Fire's "Boogie Wonderland," one of the few aural artifacts of the era that won't send you racing across the room to turn down the volume dial.

Wait, what am I saying? No remotes back then?! The horror . . . the horror . . .