Science Fiction Convention orgy (in which Harlan briefly  appears straddled on a chair by two naked women), as well as several  other scenes, were shot at Harlan Ellisons home which is  recognizable for its funky decor and the voluminous number of books  lining its walls. As with most of Harry Novaks films, the trailer  largely consists of alternate shots, so if you watch it you can see  an even longer shot of Harlan (although his face is obscured in that  shot by his hair).