I actually did organize a private screening of the OOT quite a few years back, around 1995 after the "Faces" set had come out. A friend of mine was in charge of a small, two-screen theater in downtown Portland, OR that was part of our college campus. We gathered a few friends by word-of-mouth, and used the video projector in the theater to show the entire trilogy in widescreen, using my newly-purchased letterboxed "Faces" videotapes. We even showed the Holiday Special inbetween Star Wars and Empire, which at that point almost nobody had seen oustside of the few who'd caught it in 1978.

This was a very memorable event for me, especially since I'd never before had the chance to:
A. see the trilogy in a theater before (my family didn't go to theaters most of the time I was growing up), and:
B. see the trilogy in widescreen, prior to picking up the "Faces" set.

Good times.

--SKot