From The Big Room by Michael Herr:
When they talk about luck in Las Vegas, it’s just the way they have there of talking about time. Luck is the local obsession, while time itself is a sore subject in the big rooms and casinos. It’s a corny old gag about Las Vegas, the temporal city if there ever was one, trying to camouflage the hours and retard the dawn, when everybody knows that if you’re feeling lucky you’re really feeling time in its rawest form, and if you’re not feeling lucky, they’ve got a clock at the bus station. For a speedy town like Vegas, having no time on the walls can only accelerate the process by which jellyfish turn into barracuda, grinders and dumpers become a single player, the big winners and big losers exchange wardrobes, while everyone gets ready for the next roll. The whole city’s a clock. The hotels change credit lines as fast and often as they change the sheets, and for a lot of the same reasons. The winners and the losers all have identical marks on them, bruised and chewed over by Las Vegas mitosis, with consolation prizes for anybody left who’s not already inconsolable. Don’t laugh, people. It could happen to you.