it involves balls
Genealogy is said to be the most popular indoor hobby in the US.
hot dog eating contests
poker is the mos popular card game
This question has know actual answer because people have different opinions, but I believe it is basketball.
the most popular U.S game is basketball.
ultimate ninja series
yes dota is the most popular game worlwide...i think 1 billion ppl at least play this game ...
Tenpin bowling is played all over the world. It is most popular in the US and UK, but is very popular in Asian countries as well. It is the most popular indoor sport in the world.