We watched HOTEL BERLIN on TCM last night. I'd never seen it before, and it's quite good; written by Vicki Baum, who wrote GRAND HOTEL. The story is set at the end of WW2.
I assume the film is not that well known because it has a "B," albeit talented, cast. There are no major names, just good actors like Raymond Massey, Peter Lorre, Andrea King, etc. Lorre was superb in a very un-Lorre type of role.