The Fox Venice Theatre is seen in "Messiah of Evil" (International Cine Film Corporation, 1973). The film, also known as "Dead People," was directed by Willard Huyck and stars Michael Greer and Marianna Hill. It's about a mysterious cult in a strange California seaside town.
The word on the Fox Venice comes from Jonathan Andrews via a comment to a comment on a Vintage Los Angeles Facebook thread about various filming locations in Los Angeles.
See our page on the Fox Venice Theatre for more about the building, now used for retail. It's at 620 Lincoln Blvd in Venice.
On IMDb: "Messiah of Evil"