I'm currently set up at the dining room table - we do have a spare room that may well become an office in time, but at the moment I'm quite liking the fact me and the Mrs are both able to chat across the table as we work.
Chat is a good thing! As long as it is comfortable, and you can leave the room and close the door to separate work from home life then it sounds good to me.
Yes, soon drops into a routine I found, but then I am fortunate to have a dedicated area