Why do hotel pools close in Las Vegas?

I'm flying to Las Vegas for a week tomorrow and was sorely disappointed to find that my hotel (Excalibur) closes their pool at 8pm. This is Vegas we're talking about. At 8pm the sun isn't even down. It's still around 100° at midnight. Why do Vegas hotels even bother closing at all, this is Sin City, why aren't any of them open 24 hours? I would've checked this info before because I love to swim at night, but I didn't book the room nor am I paying for it so I'm not exactly complaining.Oh, by the way, which hotels on the strip have the best pools and which are the easiest to get into?|||safety issues, try the Flamingo hotel pool.|||This can help you to find nice hotel deals.we can check and compare current hotel prices along with reviews at “hotels combined”-------------------Besthotelbookingguide.com-------------------good luck!|||i believe this is because people start drinking around those hours and don't want drunk people in the swimming areas because it is dangerous for them and the others around them. thanks. and i would say flamingo.|||I agree with you totally. However this is a trend everywhere including Florida. Part of it has to do with insurance. Another part is many of the pools are surrounded by the hotel rooms and when people swim they tend to yell and scream a lot which would bother the guests in those rooms. Another reason is that they want you in the casino rather than relaxing in the pool. The best pools are Mandalay Bay, Flamingo, MGM, Bellagio. If you want to know which are easy to sneak into ... well they are for paying guests only though some will allow you to pay to enter.