Came for Diplo on 2/20.
We got in for free (guest list) but struggled to get our male friend in (he was on the guest list too). In the end, he got in for no cover, but wasn't allowed "inside" the actual club where the performance was without paying full cover. So he got to enjoy the pool area while we danced the night away LOL.
We came at 11, place was dead. Packed by 1am. And i mean PACKED. Young crowd. Guys were tools as can be expected, and they stopped letting people in when it got too packed; security was pretty good. Drinks were club-price (i.e., expensive and weak). Women's bathroom has a valet selling FOLD-ABLE FLATS AND FLIP FLOPS! YAY!
The set was amazing and the dance floor is easily accessible - and huge. Be prepared to stay til at least 4am! Will be back for sure. Encore/Wynn really is a gorgeous hotel/casino that's well-decorated and immaculate. Everyone is dressed suuuper fancy. It's like old flashy Vegas.