Worst club experience ever. I'm a Las Vegas local and have experienced many clubs here and abroad. Hakkasan tops my worst experience EVER (topping my Tao Nightclub birthday experience where it was so packed that people were spilling drinks and getting their clothes stuck on each other because they couldn't move 5inches). This was my third attempt at trying to get in. The first time, the line was outside the casino and the second time we made it all the way to the entrance only to be told it was $10 off the main price for those on the guestlist.
My friends and I arrived early since we were on the guestlist for a promoter. We waited 3 hours to get to the coat check line, where we were notified it was MANDATORY ($5) to check in your coat. There was a huge discrepancy in regards to who thought a coat with buttons versus zippers qualified a coat check in or not (this applied to girls). We then had to get into another line to get in. When we finally make it in, the place was so packed you couldn't dance or mingle, much less stand any where remotely appropriate that didn't block traffic or get you moved because VIP tables where near by.
If you want a fun club experience go to Marquee, XS, Tryst (even though it's small). It's too bad they have some awesome headliners for EDM. But they obviously didn't plan out the layout or considered those who aren't purchasing $500+ tables. Spend your money else where.