ideal casino times

what are the best times to go to a casino? is it early in the day,(do only regulars play at those times?) evening, late night? when do most recreational players and tourists hit the cardrooms? does the time influence the quality of play?
late at night do people loosen up trying to "get even"?
any thoughts on this? what other factors affect table composition? holidays seem like an excellent time especially. any other times?

this might also fall under psychology, or even the internet forum. but since there are so many different people from different time zones online, B&M seems like a better choice.