The problem isn't so much what happens to an individual club - some described here obviously have what it takes to survive - but a spiral of decline that affects them all. Less clubs within travelling distance makes a tour more expensive, which discourage a act from touring, which means less acts available, which means clubs get less attractive and more likely to close... that process can only be redirected by changes in the overall economics or culture of the folk scene. And the culture is the more flexible bit. I suspect we will see a closer integration of on-line performance and micro-venues which will largely replace the folk club institution - it won't be back to as it was before the 1950s but something new.