These films were part of a specific mid-century subculture of naturist cinema, which aimed to document "social nudism" in various settings—from sunny resorts to, as the title suggests, more unconventional urban environments like a basement disco.
Unlike the high-glamour, velvet-rope clubs of the later 1970s like Studio 54 , this "cellar" disco is stark, raw, and utilitarian.
The title refers to a vintage 16mm nudist "home movie" or amateur documentary produced around 1965 by Halycon Media (often distributed later via digital formats like .avi ).