Why are casino windows coated?

Question

Is it for the privacy of the patrons, or more for decorum?

Answer 1

keeps the casino dark meaning the atificial lights are on at all times, therefor the punters in the casino are oblivious to the time day or night

Answer 2

Part of the gaming act has a requirement that closely follows the pub licencing laws that 'windows must be opaque in order that those of a minor age cannot view business being conducted in an adult only environment'.

It's mainly for privacy for the public, youngsters and the clientele.