You could blame the economy or the fact that some NBA teams are playing poor basketball. Whatever it is, some teams are struggling to fill their arenas with fans. This comes to be a problem for the Sacramento Kings, Charlotte Bobcats, and Detroit Pistons, among others.

Even if the tickets are free or endure a cost of $1, fans are just not showing up to games. Such is the case with the Pistons, who give out free tickets on a regular basis. Still, fans don't happen to show at games. 

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