Just went to Vegas last week - Rain was filled with WW (Palms), Jets (Mirage) and Tangerine (TI). Although - there are tons of WW out there period so you'll be alright no matter what club you hit.
Pretty much. It isn't hard to find the WW out there. It's everywhere. Just go to any of the most exclusive clubs on the strip, and you're bound to run into a bunch of them.