Great site by the way. It seems like you have a lot of data already up there. Is there a way you can leverage it to make it more valuable?
Your target audience is really 2 bases: fans and bands.
For the fans: maybe track which band or what venue gets the most clicks?
For the bands: maybe provide a resource on how to tour for bands... like a google maps plot of previous tours of other bands... which venues treat bands the best (sort of like yelp)?