They are scattered all over the basement level of the house - mostly leaning against walls.
1 bike in the garage - my commuter.
2 bikes in the furnace room - DH's road bike and his flatbar road.
1 bike in the laundry room (which is technically all one room with the furnace room) - my road bike.
4 bikes in the utility/"garden" room - 2 mountain bikes, 1 cruiser, and my old road bike, which is currently on loan to a friend of mine for the summer.
Oh, and the unicycle is usually in the utility room too, but that's on loan to a neighbor's son. We reeeally expect to get that back....soon.