Its a movie theater multiplex bought out by the Foundation. One of the auditoriums plays a different movie depending on who is watching it. The movie appears to play off the fears of whoever is watching it. Having seen what truly scares them, they are more sensitive to said fear. Subsequent movies will appear to the individual as having more emphasis on fears shown in the initial movie.
I initially wanted this to be a fear-driven SCP, but looking at it now I really wanna change it. I want to keep the idea of an anomalous movie theater run and operated by the Foundation and keep the idea of an auditorium within the theater to affect people as some sort of cognitohazard.
I moved your thread summary content to the first post and trimmed it above, OP, since it was taking up a lot of space on the forum listing. Try to keep thread descriptions under 7 lines so you don't visually crowd out other people's threads. ~Zyn