My road bike is on a wall hanger over a couch in my bedroom. Never thought of it as art, but I guess it is! Also, it's a great way to inspect that bottom bracket...

I will say that my MTB is outside, but hey, it's made for thrashing through mud. It IS nicely covered up with a tarp, however. Funny how keeping the dust off of my MTB is important, but the dust in the house is invisible. "You can write your name, but not the date..."