When is a dining room not a dining room?

That's easy - when there's a grand piano in the middle of it! My daughter, Erica, placed a gleaming grand piano where most people would have a dining room table. This makes sense because she's a professional accompanist http://www.ericarome.com/ and needs a piano for her work. Her dining room is NOT a dining room.
It got me thinking. What else do people do to change a room into a unique expression of the owner? I mean, if you call it a "living room"...what the heck do you do in the rest of the house?

I've known people who took a bedroom and turned it into a luxurious walk-in closet. A formal dining room that was never used became a poker room and home to a regular gathering of old friends. Even a living room morphed into a media room with the addition of a massive wall-hung state-of-the-art TV and a comfortable sofa.
One family had a room in their Victorian farmhouse that was furnished with tree limbs, high shelves, and cozy beds for their cats - real ones. There was no room for a human to sit, but the "cat room" was heaven for these felines.
One family had even "decorated' their entire house with Christimas Pigs. This was quite a conversation starter.
And then there are the collectors. One man had a complete "turtle room" to house his collection. I've seen rooms and whole basements devoted to trains, dolls, chairs, owls, giraffes, hippos and butterflies
.
Yes, there's a grand piano in my daughter's dining room.
So, what makes your home unique?
http://www.homerome.com/
Baltimore,md.
I toured a restored Victorian once; each room was like a museum; in each room was a rabbit from Alice and Wonderland; sometimes only two inches high; then there was (on third floor) an entire room of these rabbits!
Very whimsical and cool post, Margaret!