Best of Best Basketball Tricks *And1 kid*

"21" is popular because it allows an odd number of people to play, unlike regular basketball or other variants.
Another less common streetball variant, often referred to as "Boston," results in essentially a one-on-one (or sometimes two-on-two) tournament between any number of players. Each match is played following normal one-on-one rules, including violations (such as fouls and out-of-bounds) to just one point. The winner remains on the court and gets to take the ball out while the loser returns to the end of the line of players waiting to step on the court. The first player to win a set number of matches (usually 7 or 11) wins the game.