It wasn't until we started poking around at weekend open houses in San Francisco that we realized just how common the water closet is in this city.
At first it seemed weird to us that the toilet should have its very own room. But after a while this started to make sense, and to seem more civil than the toilet/bath combo. Separating these functions into two rooms minimizes a household's wait time and keeps the room with the bath cleaner and more. . .ambrosial.