Is a fun way to find who should pay the bill. Enter the bill amount, how much tax you want to pay, and the amount of people you are sharing the bill with then try your luck on the plinko board. If the ball fall in a safe zone you win and will not have to pay but if it falls in the danger zone you lose and will have to pay.
If you just want play plinko "Loser Pays" has an arcade mode. Shot small bullets at the plinko ball and try to get it in the high score buckets, but dont let fall on the bombs because you will lose.