Is called Podbop. 

From the description:

"We podcast bands coming to your town"

Now you can LISTEN to bands that are coming to town, see if you like the voice, like the music. NOTE:  The pages are slow to load, but well worth it.

Here is the San Francisco page.


Seriously, this is a long standing problem of mine.  There is a free evening, I want to go out and here music I haven't heard - but how do you know it isn't crap?  Now you can preview! 

Now there only needs to be MORE bands listed.

I've already lined up a couple of bands I want to see.  I'll report on the results next week.