bike racing on kart tracks????

Did anybody ever consider of racing fixi's or other bikes on an indoor kart track? They already done so in Riga / Latvia, organised by Tru Fix Crew.
http://trufixkru.com/blog/asinsspiediens-aka-blood-pressure

Another big European races are coming up in Germany, "Last Man Standing" in Berlin und Hamburg in March 2014 and August 2014 on indoor and outdoor Kart track. I thought it is maybe of interest to other fixi riders here in london. See you there. RAD RACE Last Man Standing Hamburg

This will be a LAST MAN STANDING Knockout race, an elimination RAD RACE in the KO system with 20 riders per race ( we are still testing ) . The Heidbergring provides us with a beautiful 850m long clean paved track route ... Our hearts opened, when we saw this for the first time ... So almost a track cycling competition, but without the inclined path.

After each round, the slowest driver will be eliminated. We expect that we will start the competition a first knockout round with 8 races, so with about 160 male drivers (and 40 female drivers that start from the semi-final). And then you go through to the final, in which the racers then extend a winner. Until the last man and the last woman are still standing.

Please pre-register for the race, so that we can plan the event better. Proper registration will start in the next few days.

WHO CAN TAKE PART:
There will be different classes for Fixed Gear, Single Speed and road bikes. And preferably also we'd love to have you competing against each other, so you can prove who is the fastest.

ENTRY FEE:
There are 3 STARTER KITS available:

1. 39 €
   
2. 49 € +Shirt
   
3. 109 € +Cycling Kit
   
   

PRIZES:
Fame and glory.

The starting places are extremely limited, so please REGISTER NOW to save your spot!

http://www.rad-race.com/hamburg-09-08-2014/