There is about 120 different ones.
38,974 indoor movie theaters
Han Chiang Indoor Stadium , 1966(renovated in 2007)
USSF is the United Stated Soccer Federation. This is the national association affiliated with FIFA and which fields the US national team. There is also MLS, which stands for Major League Soccer, and is the foremost league for professional soccer in the United States.
This question has know actual answer because people have different opinions, but I believe it is basketball.
4
23
many
About 37,813 US NFL football fields.
1
Around 70 million play in US.
About 105 (105.876124933827422) US NFL football fields.
There are many soccer leagues in the US. Anybody can play soccer no matter where they are or how old they are. There are club teams for children and adult leagues for adults. You just have to search around and find out what leagues are in you area.