The VooDoo Lounge is a good place to get a club vibe without all the club atmosphere. Of course, as everyone mentions the view for one is spectacular. Anytime you're on an open level that far above the city, the panorama is just breathtaking.
There are your usual club things: Blacklights and a sunken dance floor and go-go dancers in tiny skirts on platforms. But there're also places you can find to SIT. And there are places outside that aren't so freakin' loud. (When did I get so old??)
Drink prices are ri-dic-u-lous, but I guess someone's got to pay for the elevator.