If you think your bedroom is small,
just take a little tour through these pics of cozy Japanese capsule hotels that we've put together:
What is a capsule hotel? Wikipedia offers this succinct definition: it's "a hotel system of extremely dense occupancy. Guest space is reduced in size to a modular plastic or fibreglass block roughly 2 m by 1 m by 1.25 m, providing room to sleep and little more..."