OK, here are some picks from me. Hopefully there's something new here for you.
Dead Mountaineer's Hotel is a book and screenplay written by the Strugatsky brothers. The film is a little underrated but I love the atmosphere. Put it with The Shining and Last Year at Marienbad as films about mysterious hotels. Scenes alternate between inside and outside the hotel, and I especially like the contrast between the two. Outside the hotel it's a winter day bright enough to make you snowblind. The hotel's interior is nocturnal and moody with the occasional splash of neon. The plot's baffling events keep you guessing whether things are heading toward the realm of scifi, supernatural, or something else entirely.