Keeping the definition of rooftop bar on this one fairly loose, the Blu Horizon Bar in Sydney has to be my favourite place to take visitors from out of town. Located on the 36th floor of the Shang-Ri-Lah in Sydney, this rooftop bar is indoors. The beauty of this bar is it's glass windows from floor to ceiling mean your view of the Sydney Harbour Bridge, Sydney Opera House and Harbour remain completely uncompromised.
My go-to-cocktail is the vanilla passionfruit martini. Book ahead or walk-in and grab a seat near the bar.
Monday - Thursday 5pm until Midnight
Friday & Saturday 4pm until 1am
Sunday & Public Holiday 3pm until 11pm
Check out the last page of the menu, it features a $10,000 cocktail (don't worry - they're all not that expensive!).