The term midnight movie is rooted in the practice that emerged in the 1950s of local television stations around the United States airing low-budget genre films as late-night programming, often with a host delivering ironic asides. As a cinematic phenomenon, the midnight screening of offbeat movies began in the early 1970s in a few urban centers, particularly in New York City with screenings of El Topo at the Elgin Theater, eventually spreading across the country. The screening of non-mainstream pictures at midnight was aimed at building a cult film audience, encouraging repeat viewing and social interaction in what was originally a countercultural setting.
The national success of The Rocky Horror Picture Show and the changing economics of the film exhibition industry altered the nature of the midnight movie phenomenon; as its association with broader trends of cultural and political opposition dwindled in the 1980s, the midnight movie became a more purely camp experience—in effect, bringing it closer to the television form that shares its name. The term midnight movie is now often used in two different, though related, ways: as a synonym for B movie, reflecting the relative cheapness characteristic of late-night movies both theatrically and on TV, and as a synonym for cult film.[2]