I had a discussion with my engineering teacher about this . I ' m sure there are many of us Americans who find the metric system way easier but it would be too infrastructurally expensive to change . <| sep |> One thing is bingo bowling . Though I ' ve only seen this with 5 pin , which is a Canadian thing . And I can see how it would be easier to do with 5 pin than 10 pin . So , instead of just bowling as high a score as you can , you ' re trying to get a row on your bingo card , where each square requires you hit particular pins . For example , one square requires you hit just the two pins on the left . Of course , with 10 pins , you have a lot more possible combinations and some of them are in the back where it ' s hard to target them without hitting the ones in from of them . So it might be too difficult with 10 pin . And if you just switched to the # of pins you knock down , then you have only 10 possibilities . If you want to play up the versus element , maybe make something like a tictactoe game where you ' re both playing on the same card , so it ' s feasible to block your opponent ' s row by hitting the right score . Ooh , or you could have a 10 x 10 grid , where first you throw to pick the row , then you throw to pick the column . Whoever gets a fourinarow wins .