I've been WFH of over 20 years and my wife has been WFH for 10, we live in the city so our living space is smaller than most ~1100sqft and we've worked within 10 feet of each other for a decade. I do have a small office but I only go into it when I have an important customer call and I want to put everything on a bigger monitor than my laptop and I expect to do a lot of talking. Aside from that she's usually on one end of the couch and I'm on the other, with the two fat cats sleeping in between.