Kodak has a little app that allows you to put in your location and it will show films that are actually "playing on film" in one's general area. It also provides a list of movies that were actually "shot on film"--even if playing on DCP etc. Theaters must be signed up for their location to be listed so this "app" may not be 100% comprehensive.
You can use this "app" on your computer, or smartphone versions are available as well......

Right now it looks like it only works for UK, Ireland, and the U.S.
Here is a link to the Kodak page: https://reelfilm.kodak.com/

When I entered "London" for example, it came back with the 1969 Michael Caine film "The Italian Job" playing in 35mm at the
Warwick Student Cinema, Library Road Coventry, ENG GBR on Feb 28 at 7:30 pm.....
Here is a link to that result: https://reelfilm.kodak.com/movie/20609?filmFilter=true

Hey, that's us! I've been meaning to register on here for ages so to see this was a pleasant surprise.

It's nice to see that people do actually take note of the Kodak app, since I was one of the ones banging the drum to get us signed up to it. They even sent us some nice Kodak stickers and window clings which we have proudly on display.

Welcome to the forum, Kieran!