I thought about the same thing when I moved from my house into an apartment. I considered hanging the bikes from pulleys from the ceiling. Then, we just put the bikes where they'd fit, 2 in the hall, 1 in the living room, 1 in the bedroom, while we figured it out, and that's where they still are, 3 years later. Now I just think of them as pieces of art. After all, they are the most beautiful things we own.