Stand in a restaurant kitchen at half past seven and you can watch it travel. One person raises their voice and six people start dropping things. One person stays level and the whole section slows by a fraction and stops making errors.
Nobody in that room believes in atmospheres. They just work in one.
What you carry through a door on an ordinary evening does the same thing at lower volume.
Not because anyone is reading your mind, but because they are reading your shoulders, your first three answers, whether you asked how the day went.