Pollstar - The Concert Hotwire 
A concert venue database. The who's who of concert venue information.
http://www.pollstar.com/PlanetNightlife.com
Guide to nightclubs, restaurants, casinos and bars. Rate, review and discuss your city's nightlife. Covers Arizona, California, Florida, Nevada, and New York.
http://www.planetnightlife.com/
OpenMikes.org
User-contributed listings of music open-mike nights in the United States and Canada.
http://www.openmikes.org/
Musi-Cal
Easy access to live music information worldwide: concerts, festivals and other musical events.
http://www.musi-cal.com/
openfansite.com
Lists scheduled shows in college towns, accepting links to more colleges and nearby music venues.
http://openfansite.com
