Go to Opera Bar if you want a nice view. Reviewed as "the best beer garden in the world."
Establishment on George Street.
Tonic on Kellet Street, Kings Cross.
Mars Lounge on Wentworth Ave, Surry Hills.
Biggest selection of good looking places is at the Overseas Passenger Terminal at The Rocks, but it's likely frequented by wankers.
Greenwood is filled with school children.
Tried to list some not mentioned. Personally, I dont go out to clubs and shit anymore. I don't have the time and I can't stand being in a place where I have to ravage my vocal chords to have one word conversations with people.
I'm not the biggest fan of Dance/Electro etc, but club wise that's where it's at. As Simo alluded to, hip-hop clubs in Sydney are pretty dire.
Nothing beats a few mates down at the beer gardens next to Doyles at Watson's Bay for some drinks with an amazing view. It's minutes away from my house, so fuck it, if you go down there I'll join you.