Older adults engage in jukskei, a competition from pioneer days.
The games could include iintonga, (stick fighting) or those related to aiming at targets such as upuca (throwing stones) or jukskei (throwing wooden pins) - or even fly-fishing and waterpolo.
Origin
South African Dutch, from Dutch juk 'yoke' + skei 'pin'; the game was originally played with sticks from an animal's yoke.