Lots of people, mainly adult men, play Chinese Chess (中國象棋) in the parks, on the streets, in Hong Kong. I often stop to watch, when there is time.
However, the game may not be as innocent as it seems. Some men can give you a handicap of as many as 3 moves. That is, he will let you make 3 moves before he makes the first one. But he still beats you. And when you do, you have to pay him 100 dollars.
A lot of people do not just play for leisure.