I live in the city next to a busy highway. There are traffic sounds and street lamps coming through my window all night, as well as drunk people staggering down the sidewalk at all kinds of hours.
Not to mention, during the school year's latter months, I usually get about 0-3 hours of sleep a day, sometimes in an office chair or sitting on the floor against the wall. Not only that, but it's usually impossible to predict when the opportunity to sleep (and sometimes eat) will occur. Under conditions like that, you learn to take advantage of any chance to sleep you see. I've become pretty good at sleeping anywhere under any conditions.
If we're working at someone's house, and I get to pass out on the couch, that seems pretty luxurious. It's all pretty bitter, considering I own the world's most comfortable bed.
If all else fails, there's always rainymood.com [http://www.rainymood.com/]