When home movies were all the rage in the '60s and '70s, we used to move furniture out, and then back again when done. Movie screen and audio were also brought out, set up, and then stowed when not in use. We used to have family reunions with the cousins etc. coming from out of state and we would rearrange to accommodate. This all took around 5 minutes at most to move chairs in and my dad and uncle used to set up the functional bits of the process in 15.
I reckon I just don't get the idea of permanence with modern audio setups, vs. less than optimal rooms. While the electronics can certainly remain planted, speakers and chairs can be moved in, out, or around when it really matters. It's certainly easier than loading up the car for a night at the drive-in or walk-in theater.
When I do music marathons, I move sofas and MLP for the best performance and for extra guests when needed and even put a padded area rug down that the dog would otherwise takeover if it were in place all the time. Otherwise, I do mostly a more head-phonic styled near field experience for just myself. This opens up many more performance possibilities, regardless of what the room otherwise dictates.
Static audio setups rarely work outside of dedicated/designed HT rooms, especially with the modern penchant for the almighty open and highly reflective floor plans. I get enough daylight and UV outdoors, and am ready for some low-light atmosphere by the time I come inside.
I have a friend of mine here in Tampa doing just this now. It had never occurred to him to move his speakers 2ft out into the room, and his sofa off of the back wall on weekends. He and his hunny-bunny only watch movies on weekends and just regular TV during the work week so they don't really need the all-out experience all the time. Truth be told, they could get by with a sound bar for their regular TV duties during the week. He likes listening to music a lot more than his wife does, so he too now, has a potent near field desk setup in a spare room that he has acoustically treated and soundproofed.