The Dresss code for NYE isnt going to be that much different from the rest of the year in Vegas but with that said when you go out put on your "Sundays Best". Alot of people go all out for NYE. Guys put on a suit and girls put on a dress. With the amount of people here clubs are going to be a little tougher on dress code. Don't get left out in the cold cause you didn't want to get dressed up. Check out my oringinal post
Change Clothes and Go : Dress Code Hats are usually a no but top hats and fedoras are pretty much a go. If you have any question on the typical dress code here. Any question get back to me.