There is a common belief that slot machines pay out more at night, but this is largely a myth. The payout percentages of slot machines are determined by random number generators and are set in advance by the casino. These settings are not altered based on the time of day or the number of players. While personal experiences may lead some to think they have better luck at certain times, the outcomes are always random and unaffected by external factors like the time of day. Therefore, there is no evidence to support the idea that slot machines pay more at night.