We get some shots of the exterior of the Los Feliz Theatre, 1822 N. Vermont Ave., in the ten minute public service film "The Dangerous Stranger" (Sidney Davis Productions, 1950). Thanks to Bobster1985 for the screenshots. They're a contribution from him on the Cinema Treasures page about the Los Feliz.
The film warns us not to accept rides or gifts from strangers and offers tales of several kids who did -- and didn't come back. The policeman in the film warns "...their mothers and fathers never saw them again. I know you wouldn't want to do that to your folks."
Approaching the theatre.
A look at the Los Feliz boxoffice.
Buying a ticket.
This is the guy to watch out for. Looks harmless enough. But he smiled at her. During the film he sits next to her and puts his arm around her. We're warned "Never let a stranger put his arm around you. Get the usher!"
The film is on YouTube from Ziptrivia. There's also a post of it from A/V Geeks. It's also on Internet Archive.
See the page about the Los Feliz Theatre on the Los Angeles Theatres site for more about the building. It's now a triplex operated by Vintage Cinemas.
On IMDb: "The Dangerous Stranger"