A Star Trek TNG Ten Forward door cover by Thinkgeek:

This Star Trek Ten Forward Door Cover will make any interior door look like the entrance to everyone’s favorite galactic watering hole from Star Trek: The Next Generation without the exorbitant expense of building a spaceship. (As an added bonus, these same doors were seen in the first season – before the set for Ten Forward was built – in Starfleet Command in the episode “Conspiracy.”) Intended for interior doors, this 38″ x 84″ piece of fabric has elastic on the corners so it stretches to fit over your door snugly. You have to provide your own El-Aurian.

[Star Trek TNG Ten Forward Door Cover]