the room with no purpose
people walk through the dining room to get to the kitchen
A room in which the twentieth century family sits down to have a nice meal together, usually dinner or supper for you southerners. Commonly, now adays, the dining room consists of computers, toys, boxes, last years christmas fruit cake and maybe even a book case.
"Will you turn the light on in the dining room so we can eat"
"Get your ass in the dining room and get me a book!"