"Hopefully some of them will pick up on the folkier music on offer and develop an interest."

I think that hits the nail on the head. Hopefully once they hear what some of the others are playing they will explore. The vast majority of what is played here is acoustic though there are a couple of electric guitarists too. We did have one lass who played one backing song through her i-pod as she sang. We didn't want to encourage that as it is about live music not karaoke. Nobody said anything at the time and it turned out to be a one off anyway so there was no emerging issue.