Nice, I wouldn't mind visiting one, but I'm broke.

Still, as TGC conventions don't seem to happen much anymore these work as a nice excuse for TGCers to meet up. I know you met Cian Rice/Anime Blood at one of these (because he told me)
However, I was passing through the Netherlands last week, but I doubt the coach driver would have taken a detour to your nearest pub.

I've met a couple of TGC folk so far, one was through pure coincidence.
Well, good luck and hope you guys have fun, these events sound pretty cool (in geek terms at least).