Thereís thoughtlessness in how people consider their audience thatís reflected in how they set up chairs. You can see that thoughtlessness immediately.
An example: Thereís a literary reading in a large room, and they have a few tables spaced out far from each other near the stage with chairs arranged around them. Behind that they have a couple of rows of chairs, theater-style, then behind that thereís space for people to stand. Now, this is terrible, and what it reflects is the degree to which the organizers havenít thought about their audience.