This lively article highlights public and school libraries around the US that have successfully attracted and involved teens in a variety of activities. Among the resources that they point out is a study from 1999 called "The Coolness Factor", published by the Urban Libraries Council, that doesn't sound as dated as you might think.

• Standing room only: want to get teens excited about the library? Just surrender some control. Diane Tuccillo. School Library Journal 53.3 (March 2007): p46(3).

• The Coolness Factor - Ten Libraries Listen to Youth. E. Meyers.  Urban Libraries Council, 1999. http://www.urbanlibraries.org/showcase/cool.html