We don't have any dedicated hardstyle clubs here on the Gold Coast.. It's all generic top 40 stuff being blasted at 95% of them. Your best bet is Brisbane.
Family, Empire and Birdee Num Nums are my three favourite places there, you probs won't get 'just' hardstyle but the music will be a billion times better than you'd get at like Sin City or Vanity down here on the Coast..
If you're sticking with the GC, I'd recommend Broadbeach instead of Surfers and hit up Platinum.. If you're going with Surfers, Luna Loca & Temple would be my two picks.. Temple plays great house/french house/electro stuff FYI..