Recently we moved my office from one end of the house (in the third bedroom) to the other end (in the old dining room). What happened to the dining room, you may ask? We moved it to the den. The den? Well, it really doesn't exist any more. We pulled up the carpet, put in a hardwood floor, painted, replaced the ceiling fan with a chandelier, and now it is our formal dining room. It's also a lot bigger than the old one, so we can put a leaf in our table and have more than 4 people dine comfortably at the same time at the same table.
We did away with the den because we figured that we had two rooms that we didn't really use - the formal dining room and the formal living room. That didn't make sense. Something like a third of the house and we didn't even use them, except on rare occasions. So we put a TV and a computer in the living room, and organized it a bit differently, and now we have a living room where we actually live. We've spent more time there in the last couple weeks than we have in the entire five-and-a-half years that I've lived in this house. Except when my bed was in there, perhaps. Or when Tigger lived there.