Simple game. One asks if they've seen a certain movie (within the detective/noir genre). The next person responds either in the affirmative or negative and asks about another movie.
Have you seen Lost Weekend?
Have you seen Murder, My Sweet?
Have you seen Murder By Death?
Have you seen a Murder is Announced?
Have you seen A Perfect Murder?
Have you seen Clue (the movie, 1985)
Have you seen The Number 23?
Have you seen Sleuth (1972)?
Have you seen Murder on the Orient Express (1974 film)?
Yes, actually. ;-)
How bout Casablanca?
Have you seen the new Sleuth?