Shower Bathroom?!

I went into a high-end department store the other day to use the bathroom and saw a sign that said "shower bathroom." I felt anxious poking my head into the stall not knowing what to expect! I mean, what exactly is a "shower bathroom"? Why would they combine a shower and a toilet? Why would anyone take a shower at a department store?

....I cautiously opened the door and found...a regular bathroom! Well, you wouldn't call it "regular" in the States 'cause it's one of those fancy wash-and-blow-dry type of toilets, but I was still relieved that there were no surprises.

The surprises with bathrooms are never-ending over here. What will they think of next?!