Like Andy says, the track really needs to go downstairs, that area would make a serious track for an indoor club, and would more likely to get you the numbers you need to keep the place open.
I also think you really need to commit to a regular weekly evening slot so that people know there is a meeting on regardless of what week it is.
I would go for a friday night slot, its a very popular evening at Caldicot and as far as I'm aware there's nothing else going on that evening in the South West.
I would be more than happy to come down and help move the track, might even be able to get you some more carpet/astro if you need it ... also have a pressure washer if you want help cleaning up the downstairs floor area first too ..
