2 Bikes 2 store?  Check out the Swagman Ultra Hang-it 2 Bike Hanger.

• This handy bike storage hanger allows you to store two bikes almost anywhere in a room with some space, a floor and a ceiling
• Expands to a maximum 9' to span from floor to ceiling
• Hooks can be set at varyings angles and heights to accommodate most any bike
• Quick and easy to put up and take down