This is probably the number one backpacker’s bar in Sydney. This place, especially once nighttime kicks in, is a nonstop party bar. Every night there is something different, so you need to check out what's going on. They even have crab racing one night a week. Drink beer with locals and other travelers (it’s right next to the Sydney Central YHA), so most of the backpackers from YHA tend to hang out there.
It has a great atmosphere and good beer!