While 99% of the bikes in the Brisbane to the Gold Coast Cycle Challenge were drop bar road bikes, I saw probably half a dozen tandem road bikes, mostly with couples on them. They all seemed to be Cannondale bikes.
Other bikes I spotted included a handful of fixies, a recliner bike, flat bar road bikes and mountain bikes. And there were also a couple of lunatics riding Brisbane City Council City Bikes. I bet they had a blast.