DeG:
What a good idea, Will. Could be expanded into the context of where folk clubs go and satisy even the most ardent critic. If we call the folk club a 'music night' with definitions like yours maybe we can atract more while ensuring that people know what they are getting in advance.

The list I linked to is edited by Bryan on a regular basis, and with (I believe) a little IT wizadry regarding dates?). It certainly is useful. I'd certainly dare to drop in to the sessions at The Bull in Ditchling - but The Pond in Brighton is pure Irish - with fiddlers like Ben Paley on tap. Scary!