Confined Conflict: People in Boxes

Many films involve eclectic groups of characters forced to cooperate in a confined space. I love films with character and, for these films, this is an essential element. While the films on this list succeed to varying degrees, the result is usually interesting.

The criteria:
1) A group of four or more people for variety
2) The characters should interact with more than just one or a few characters (i.e. not The Usual Suspects)
3) A (or a series of) confined space(s) with little or limited privacy
4) The space must be difficult to successfully escape
5) Most of the film should take place in the space
6) None from the imprisoned by killer subgenre (i.e. not Saw)

Suggestions welcome!
(Some of these I haven't seen, so feel free to let me know when I'm mistaken.)

  • Stagecoach
  • Blind Alley
  • Lifeboat
  • Key Largo
  • Rope
  • The Dark Past
  • Rawhide
  • Storm Fear
  • 12 Angry Men
  • Night of the Living Dead
  • Horror Express
  • Murder on the Orient Express
  • Dog Day Afternoon
  • Assault on Precinct 13
  • Assault on Precinct 13
  • The Mist
  • The Hateful Eight
  • Murder on the Orient Express
  • Bad Times at the El Royale
  • 10 Cloverfield Lane