I don't see the point in paying to go to a place like that, now that everything is open later. I reckon Chambers is your best bet, though it depends on what night it is, what DJ's are there etc. Pipers is proper rough and ready, and I suppose Indigo is the one for the young person's dance music. It's the biggest and most modern club.
This is part of my website The 'Gerald that I built in a fury of excitement when I first came to Folkestone sometime in 2004. I had been a frequent visitor for a while before that so I am technically one of those DFLs you get nowadays. The site was updated more frequently with a gig calendar + voting for best venues + things, + I know it was a useful resource for those who were moving here. Now I've moved out of Folkestone again (though just a couple of miles) it doesn't get as much love as it used to. Ironic really as The town is now becoming the exciting place we knew it was about to become. I am not Gerald by the way, the name comes from a pretend newspaper in an episode of Brasseye or something, the Portsmouth Gerald, and how there is a local newspaper here called the Folkestone Herald. Puns like this are great aren't they? Do get in touch if you have anything to contribute, email anythign @ this domain, or try @folkestone or @pauly on Twitter.