Well, keep trying to solve a evening in a living room (late 60s, early 70s) scene. This is my result. Lots of struggling, and yes some sleepless nights. The ceiling light fixture is another problem, that I can not solve, and will leave it for future blender, Version 2.8.

Note When I first started this, I had no problems with HDRis and outside lighting. Now, when using HDRi and lighting, all of a sudden (now), I am getting light going through walls. floor, ceiling. I thought I had it solved earlier, and the problem came back. Never was a problem before on this project. Is is due to saving a project the mesh loses its features or gets messed up on the loading? I dunno, I am putting this aside and now onto Halloween.