After the game/training, there is generally a big waiting line in the bar of a sports club. To increase efficiency of the bar and better cash control, vending machines dispense tokens that can be used to pay for drinks.
When distributed via vending machines, stainless steel, brass and aluminium are the most popular choices. When sold behind the counter, aluminum and plastic are the most common choice.
Stainless steel, brass and aluminium tokens function well in existing coin counting systems.