We have one of those gravity racks that holds two bikes. It fits inside a really large closet we have in our apartment.
DH was concerned after it scratched my bike, so we lined the hooks with microfiber cloths. It works really well and was the only solution for two road bikes and one mountain bike in a 800 square foot apartment.
Amanda
2011 Specialized Epic Comp 29er | Specialized Phenom | "Marie Laveau"
2007 Cannondale Synapse Carbon Road | Selle Italia Lady Gel Flow | "Miranda"
You don't have to be great to get started, but you do have to get started to be great. -Lee J. Colan