OK, I had a nice search online, and found this:
As normal tickets are bloody expensive (6-8EUR for 6-8 minutes) and we would like to have a champiobship anyway, it's cheaper and better to rent the whole track for an a hour. Here are the options:
1. Eurocenter cart hall
-10 minutes walk from our flat
-320m long course in a hall
-computerized lap time measurement
-no organzied race, we have to do it ourselves
-1 hour with 5 carts = 280EUR
-with 8 pipsqueaks it would be 35EUR/person
-only 5 can race at the same time.
http://eurocenter.gokart.hu (HUN/GER)
advantage is that its really nearby. I think its no problem for us to write up the lap times, and make a qualifications, then some races. But of course its more fun if all of us can race at the same time.
2. Budaring cart course
-1-1.5 hours of travel with public transport
-700m long course with a bridge, lights in the evening
-computerized lap time measurement
-at least 6 persons needed
-all of us (10 pipsqueaks max) can race at the same time)
-5 minutes warm-up
-3 laps qualification
-15 laps race
-first three gets a medal and the winner also a champagne
price is 30EUR/person.
http://www.budaring.hu (HUN/ENG)
Advantage is that the track is longer (double length!), and all of us can race at the same time, which is of course more fun.
Of course we have to travel for this option but it might be more enjoyable (medals!!!

)
I dunno how much time do 15+3 laps on a 700m track take, you are the expert JTK.
3. Campona ring
-1-1.5 hours of travel
-unknown track lenght
-1 hour, six carts = 200 EUR
-that's 25/person with 8 pipsqueaks.
-computerized lap time measurement
http://camponaring.hu (HUN)
well this is the cheapest if 8 of us would like to race. But anyway its the same as option 1, except that its an open-air track, not under roof.
waiting for comments.
