Originally Posted by saddlesores

you're in a hotel? got a couple of chairs in the room?
call housekeeping and ask to borrow a broom or a mop or a really skinny maid.
stick broom handle under the top rail of the rack, suspend on the top of the chairs.
tie the front wheel to the downtube, stick it in the corner to stabilize.
don't forget to stick some packing material between the wheel and wall to prevent stains.

or if you've got a balcony, there should be some eye-hooks or chains in the ceiling.
can you find a couple meters of light rope?