We have finally hung the Motobecanes up on the wall and cleared up some floor-space in my art studio. Now there are "only" four bicycles there: the Pashleys and the vintage DL-1s. It is not a large studio by any means; I have no idea how we managed to store six bicycles there. At least now these two are suspended from hooks in the bedroom.
I think the Motobecanes look rather nice here. The door on the left is a closet, and yes the positioning of my mixte makes the closet impossible to open without taking the bike down. That is okay, because it is a long-term storage closet and we only open it occasionally. There was no other place to hang the bikes in the entire apartment; the rest of our wallspace is covered with book-cases.
We used common 5" threaded, ruberised hooks that you can easily find at any bike shop. They are intended for wood, and you need to be sure that you are screwing them into wooden beams and not drywall. Also, this probably goes without saying, but this method is not intended for extremely heavy bicycles, such as Dutch bikes or English Roadsters. Our vintage roadbikes are around 30lbs each, and I would not go much beyond that weight.
We like these hooks because they are sturdy, yet unobtrusive. We did not really feel drawn to bike trees and funky wall-mounting systems, as those tend to clash with the delicate ecosystem of our dwelling's aesthetic. With these minimalist hooks, the bikes remain the focus of attention, like fine pieces of art. Incredibly imposing art.