There are a bunch of skybars in LA, but while I was there I had a chance to check out three of them.
City Club on Bunker Hill: Best view in the city from the 53rd floor of the Wells Fargo building. Members only, but you might be able to get in if you call and ask very, very nicely. Expensive, but not outrageous for the bar.
The Standard: Distinctly in the city with good views of the surrounding towers and the street below. Have a very 70s retromodern feel. Divided between a faux german bar and an "ultralounge" type environment (including water bed red dome things). Pool. Pretty nice overall, but only on the 15th floor. No cover, $8 beers.
WP24: A Wolfgang Puck restaurant on the 24th floor. Expensive, even for happy hour, but the food looked good. The view isn't as good as the other bars but the interior is much nicer. In contrast, the City Club feels a little tired and the Standard has a very different feel. Probably one of the better restaurants in the LA Live area.
Want to see photos? Check them out over here: