I'm a product designer in Melbourne, who takes every chance I get to go exploring.
Sydney is home to a myriad of video game aficionados, some fans, some indie developers and some industry professionals. While often found at their houses engrossed in a game until the wee hours of the morn, when they get out, they certainly know how to have a good time.
The International Game Developers Association (IGDA) has a Sydney branch, which often hold fantastic events for gamers and developers to get together, have a few drinks, and generally just talk games.
You definitely don't need to be a member of the association or, heck, even a gamer to come along and enjoy. It's always a fantastic environment and there'll always be someone walking around with a iPhone full of games for you to try out. People want to talk, get feedback on things they're making and just generally socialise.
The next event will be held next Tuesday, the 22nd of May, at the Arthouse Gallery Bar. Things will kick-off around 6.30pm, with 2 minute micro-talks at 8pm (these are very interesting; definitely be here by 8pm!). Entry is totally free, though it's appreciated if you grab a drink at the bar.