From Signal vs. Noise:
From a design/experience perspective, casinos are fascinating places:
1) There are no windows. Gamblers have no idea whether itâ€™s light or dark or sunny or rainy outside.
2) There are no clocks. Dealers are forbidden from wearing watches. Time becomes meaningless.
3) Thereâ€™s intentionally poor navigation. They are built like mazes meaning itâ€™s usually tough to find a way out.
4) Thereâ€™s a constant barrage of noises. Slot machines spin, games ding and dong, coins hit metal, thereâ€™s the pitter patter of the people running the games, etc. Many of these sounds, like the ringing of the slots, is there to give you a false sense of hope (â€œIf all of those bells are ringing, somebody must be winning!â€).