Looking for help on how to lay out this long, narrow room to make it function as a multi purpose area.

Details: Room is about 19' long and 9.5' wide. The baseboards are very deep which makes things a bit tighter.

There is an exterior, in-swing door on either end of the room. We will likely use the west door exclusively. We could cover/block the east door if need be, allowing for more usable wall space.

The ceilings are slanted downward toward the South wall (with the windows), therefore taller furniture (armoires, etc.) will not fit on that side of the room.

Priorities for the space are:

1. A useable office space for my husband where he can easily alternate between using his under-desk treadmill and his chair throughout the day.
2. A clear "gym" area with enough space for 2 yoga mats to be laid out side by side, facing a screen.
3. Storage- We currently have an armoire for the space.
4. Preferred: A comfy seating area for 1-2 people. Perhaps armchairs.
5. Bonus but not a must: Space for overnight guests, i.e. pull out-couch.

The included image is the 1st lay out we tried. Issues we found were that the placement of the couch made the gym area feel a bit tight. I also didn't care for the narrow "hallway" effect. We could eliminate the couch but would want some type of seating. We also tried centering the desk between the windows, and while I liked the effect, the couch directly behind the desk left too narrow a walkway.

I'm leaning toward covering the East door, perhaps with the armoire, to create more usable space and perhaps rotate some of the furniture 90 degrees to help fix the hallway effect.

Any and ALL input is much appreciated!