Update - the karting went very well, some very fast drivers and the odd slow one like me to bring up the rear. 3 sets of 8 laps each (20 of us in two groups of 10), before a final race of 14 laps. The track was very slippy, although thankfully the karts just understeered rather than spun. The almost complete absense of any lighting added another element to the racing, it's certainly more of a challenge to hit the apex when a) you can't see it and b) the kart only wants to go in a straight line. Good fun though, and there was some closing racing to be had.
Some good food has followed and everyone is really starting to get on and know one another. One of the guys even brought his English wife, which has made for some easier conversation for me.
For anyone looking for photos of the event so far, photos are slowly being added to the official thread over on the Swedish LFS forums: http://forum.liveforspeed.se/viewtopic.php?t=3252
Now I must continue drinking this 5.9% beer and fire LFS back up. I'll be flying back home in 18 hours so don't want to waste the opportunity to get whooped by some crazy drunken Swedes (and a Norweigan).