Large foyers are places where you see people waiting.
Some wait for friends to appear.
Some wait for a taxi.
Some wait for an appointment.
Some look impatient.
Some need to move around and inspect their environment.
Some content themselves with reading a newspaper or a book.
Some need to drink coffee.
But for all those waiting it is a transitional phase between the immediate past and the immediate future. The period of waiting forms a bridge between two phases of time where life circumstances can change.