In some regions in Asia, such a thing is placed upon a piece of wood board; a person sleeps on it as his bed. In my first langauge, it is known as a 'bamboo mat', but what is it called in English?
Okay a "wet room" here, and they're quite a new thing, is just like a shower room without any surround to the shower.
A drain on a tiled floor is sensible, it allows you to sluice down and mop up quickly. Maybe for warmer climates?
Could be.
In some places I stayed at, the bathroom floor was raised to fit in the drain. Forgetting this one night, I slammed my foot into a marble step up at the bathroom doorway. Gaaaah.