1917 editor Lee Smith reveals the truth about Sam Mendes' one-shot film

This is my favourite passage from this article:

He asked [a journalist] how long the film shoot was; she looked at her notes, said four months. How many days a week? Five.

Do you think they never turned the camera off, he said; just do the maths. "And she went, 'Oh, right'."

I love single-location films, and use them as inspiration for my own very-constrained filmmaking endeavors. This is a space where great screenwriters and filmmakers shine, coming up with creative solutions to keep things fresh and enticing with little to no variation in ambiance. Some examples:

• 12 Angry Men (1957)
• Straw Dogs (1971)
• Dog Day Afternoon (1975)
• El Angel Exterminador (Exterminating Angel, 1962)
• Phone Booth (2003)
• Coherence (2013)
• The Invitation (2015)

But I want more! Any ideas?

I should add that my motivation for this question is research for my next production, and because of practical concerns I'm only looking for single-location films in which the main location is small and simple enough that its sub-divisions cannot be considered a location of their own. For example: according to my criteria, a large house or apartment would be a single location, because its subdivisions (living room, bathrooms, bedrooms, etc) can be considered as logical parts of the main one. A shopping mall, a large condominium or an apartment complex would not be a single-location, because its many buildings and apartments are distinct and independent enough to function as locations of their own. When in doubt, try applying production pragmatics instead of pure logic. If something is logically not really another location, but would be just as hard to manage as another location (a whole new set design), it is a location. Thanks!