What is the difference between public goods and club goods?

A public good is a good that is both non-rivalrous and non-excludable. Examples include the air we breathe or broadcast television. Individuals cannot be excluded from consuming these goods, and one's consumption doesn't impede another's simultaneous consumption.

A club good is one that is non-rivalrous and excludable. Examples include cable or Satellite Television. A cable company can exclude individuals from viewing; however, one person viewing doesn't necessarily impede someone else's simultaneous viewing. At some point a club good can if fact become rivalrous, however. For example, a hotel's encrypted wi-fi may become rivalrous at a certain point due to network congestion and bandwidth usage.