I ran across lately a series of web pages talking about gaming in libraries.
Apparently the national library organization released some goals for libraries, in terms of how they help children develop. A big part of those goals involved improving their critical thinking skills, and gaming advocates jumped on that to support libraries offering board games and role playing games (both being activities that improve critical thinking through imaginative play).
I'm a big fan of gaming, so I'm happy to see this trend. My daughter is three and a half years old, and is already heavy into gaming. She may not understand the rules to my board games, but she loves to get them out and play with them, and her attempts to understand them is building her critical thinking skills.
iLibrarian has a nice page with links about gaming in libraries. The Escapist, a gaming advocacy site, also has a great page with resources for gaming in libraries.
So the next time you want to play a game, think about your local library!