Here is something that many might not know.  In foreign countries, there are many athletic clubs.  So the same people that you see at the stands follow the same soccer team, indoor soccer team, basketball team, volleyball team, etc. It's like having the name ‘Tampa Bay Buccaneers’ for every sport imaginable.... OR even easier to compare, it's like college schools being professional teams.  Same team colors, same team, ONE big family of fans for every sport.  And you usually pay (donate) to the athletic club and you are usually given a membership card.  Then you can use the facilities and even attend games for free (usually for none revenue sports).  Also, there are usually many leagues (division 1, 2, 3, 4, 5, etc.) for every sport. That is why you see many soccer teams with the initial FC (futbol/football club) and then the team (or association name).  If it's basketball then BC is added and then the team name, etc.