There comes a time in many an apartment-dweller's life when it becomes necessary to trade square footage for mobility. For longtime AT:SF readers, this is also known as the tripping-over-the-wheels-in-the-hallway-problem.
Some friends who share an apartment and both bike to work everyday tell us that they've solved it once and for all with a Minoura Bike Tower. They house two bikes, but the spring loaded, floor to ceiling aluminium alloy system can actually accommodate up to four with the addition of extra hooks.
Not sure if it is cool to post this here, but we bought one of these stands and our landlord doesn't want us to use it in our entry for fire safety reasons, so we need to get rid of it. It was only set up for one day so it's brand new, and we're asking $50. If you're interested and live in SF, please email me. We're also having a garage sale where you can see it on Saturday morning at 17th and Church.
Sorry, that email address is cindy(dot)yep(at)gmail(dot)com.
We do this in our hall way, but we have 2 of them and only hang one bike on the top-most bar, so that no one hits their head on the handle bars. (my boyfriend is like 6'5" so the bikes are enormous).
On the topic of bike storage... you may want to check out the Delta Michelangelo Two-bike Gravity Stand... it holds two bikes vertically and doesn't require any drilling as it leans against the wall (also good if you have really high ceilings)
I have to agree with nils re. the Michelangelo Two-Bike Gravity Stand. It's both functional, and stylish. In addition, the fact that it requires no drilling is a big plus for those of us who rent.
We have one. It is important to realize that you need to place the bike pole beneath a ceiling stud or you will punch a hole through the ceiling, so you can't just put it anywhere.