Oh, its very functional, and you can see the different areas with their purpose here in more details:
Maybe I should have brought in more pictures right away.
First you usually want to get clean, thats what the** wet area i**s for. There you can take showers, foot-baths, cold/warm water treatments and don’t have to worry about spilling water, as the floor there is designed to safely take the spill water away. The shower area is by intention not entirely closed, as this would give a enclosed feeling, like in a shower-cell and we dont want such analogies or claustrophobic surrounding. Of course the transparent protection walls there prevent the water from spraying over, but they dont lock up the user/s of the wet area.
Secondly, and right next to the wet are, is the hygiene area. Soft and water absorbing carpets lead you from the wet area (see 2nd pic in the original posting) above to the hygiene handwash-basins for “him and her”. The red shelf and red accessory on the left indicate the one for “her” and the blue shelf and blue accessories to the right for “him.” This and also several other arrangements of furniture “for 2” also answers you’re question about who and how many people reside here.

Then there is the bathtub with pillows for headrest, or the **jacuzzi **with the small bar-area next to it: so you not only have a dry and safe surface area to reach from within the jacuzzi (for food, drinks…) but also people in the water can keep in contact with dry people outside there.
And yes, the ceiling/roof is open above the jacuzzi, as you can obviously see the clouds/sky. So you can imagine having a cupola over it for bad weather or have it moved aside on sunny days to enjoy the sunlight direct within the spa/jacuzzi. Might sound decandent, but money is not the limitating factor as explained in the introduction.
After so much water you want to get dry, and thats why there are areas for that on the outside (for good weather) as well as on the inside (bad weather).
See the sun terrace and the winter-garden / sunroom areas.
Then you can relax on several areas for that purpose, might it be more in the sunlight or more cafe-like in the shade (and yes, i know the windows are over-exposed bright, but thats how the human eye sees them, if it focuses on the dark areas. Humans dont see in HDR, and Remdbrandt knew this also):

There is even a fireplace for cold or late visits which offers the fitting ambience for that.
If there are guests, there is plenty of sofa-space for them to relax:
So all the areas are very functional and thoughtfull placed.
Regarding the varnished wood floor: of course you dont want to walk on bare tiles or other sterile surface even in a bathroom if it can be avoided. And it can be avoided: Apart from the protected shower area, there are soft soaking carpets connecting all the areas. So you can even choose to walk barefeet all-over even tho there are slippers ready next to the wet areas (bathtub, showers…). If you choose to step barefeet out of a wat area, then the carpets dry youre feet before you reach the comfy wood floor. Even if there comes some water on the wood-floor its varnished and protected, so it does not take damage.
The overall colour palette is blue/white with some variations for different areas: e.g. you can see coloured glass bricks on the walls or jacuzzi. Then I also made the materials of some furniture fit the blue sceme (see the blue metal/chrome on loungers, towel-holders, bar-furniture…) even down to details like the chess-figures. Speaking of details, all objects fit to their location, even down to small objects like the sponge in the shower.
So the objects are also choosen carefully, made to fit and placed organised.
The overall feeling is comfy as well as clean and people would enjoy being there.
I wonder why you don’t see that?
Funny thing is, i got a request of a VR-company in response to this thread and other of my works.