The objective is to pack them as closely together as possible. Some people are in the unenviable position of being limited in their bike purchases by storage space. For those people I recommend making friends with those that have more storage room than bikes (I know, how can this be?) and bone up on the Zero Bike concept.
__________________
If someone tells you that you have enough bicycles and you don't need any more, stop talking to them. You don't need that kind of negativity in your life.