MOJAM ALREADY DOES THIS and has forms preloaded to look up anything entered. Including people to jam with in your area.It is international and only needs us to load it up with listings. Performers would benefit too, by being better able to find venues. Seamus Kennedy and Anne Hills are listed with Mojam. I bet other Folk are too. And there are folk venues listed there, though not enough yet.
Why are we inventing a big wheel someone else has already invented, when we are already short on resources and volunteer power?
$0.02
~Susan