Are caps hats? I'm thinking technically not. And because I think this, I've had to resort to putting up a picture of a hat-wearing statue -- to be precise, one of the hundreds (if not thousands) of different-looking life-size religious figures (including the wrinkled sage I featured in a previous Photo Hunt) one encounters going up to, on and down from the hill which is home to Shatin's interesting 10,000 Buddhas Monastery.
For the fact of the matter is that there aren't too many hat-wearers in Hong Kong. Indeed, the distinct impression one gets is that the days of hats being considered an essential, or even fashionable, adornment are long gone. (Though I'd grant that in winter, a few wooly hats can be seen adorning folks' head every once in a while!)
If, on the other hand, there were a cap-themed Photo Hunt, I'd not lack for subjects... heck, even I have a collection of those about (whereas the one hat I myself own is gathering dust back in my room in the family abode in Malaysia, having last been worn when I was on safari in Tanzania more than a decade ago now)! ;)