The Uptown used to do revivals between big releases. I saw Blade Runner, Ben Hur, 2001, and other classics there. They did not make money on those and had to convert to 100% current releases. I think it is now closed.
The Air & Space IMAX theater used to do “Sci Fi Sundays” where they played a classic science fiction movie on Sunday evenings as the last showing.
The Avalon is in one of the richest neighborhoods on DC/MD border. When it went bankrupt all the neighbors pooled their money and started a nonprofit to keep it open.
The AFI has a theater in a MD suburb, which shows all sorts of revivals and classics year round.
In every one of these theaters I am always shocked to see how few people a classic pulls in. Went to see Blade Runner “Final Cut” at AFI on a huge screen and there were like 40 people. 2001 in a 70mm print was about half full. Inception or Interstellar in IMAX (the real one, 70 ft tall screen) was less than half full.
A small takeaway is that, with so much historical catalog, the audience is very finely chopped up. Only a relatively small % of people love each old movie enough to rally to the theater at a specific night and time.
The big takeaway is how crucial strong marketing is for theater attendance. Undoubtedly there were many available casual fans who simply did not know about these showings. Mass marketing is hard and expensive.