Pittsburgh Dance Sites

USA Dance Pittsburgh Chapter: Local chapter of USA Dance, an organization which promotes dance via socials, lessons, and other activities.
List of Pittsburgh Ballroom Studios (on USA Dance Pittsburgh website): Note that this is not necessarily a complete list.
Swing City: Social swing dances with lessons every Saturday night at the Wightman School in Squirrel Hill.
Coal Country Traditions: Local organization sponsoring classes and socials for Swing, Latin, and Argentine Tango.
The Groovejuice Special: CMU's Lindy Hop Club, now redirecting dancers to socials in Regent Square

Other Sites

USA Dance: National organization for amateur ballroom dancers. Great resource for finding out more about nationwide events, competition rules, the Standard and Latin Syllabi, etc.
Feather Dance Shoes: Online seller of ballroom dance shoes which offers free shipping to CMU Ballroom Dance Club members.