Movie Theater.
Currently showing: "The Movie of Everybody".
The audience is composed by the actual protagonists, each in his own life movie. None of them seems to notice the other people: everyone is too busy staring at his own life on the screen. The children, extremely young and vulnerable, are in the front row and the age of the "spectators/protagonists" is directly proportional to the distance of their row from the screen.
It's possible to peak a particular thought or a significant event of the life of the viewer on the lenses of his/her 3D glasses.