This is an indoor go kart track that just opened up down the street from my house. They use electric go karts! There is another one that is indoor that I have been to in Anaheim that uses gas carts so I will have to see how the two compare.
A local track, www.TampaBayGP.com does the same thing. What you havent seen are the competition karts. They will about double the speed, unfortunately my track only lets special people drive that. They are crazy expensive though. Were talking 10K a kart.
They had a thing about that track on the KTLA news this morning, didn't learn much more than I already knew about them, but it was cool to see them in action. I would love to go to a place like that and wring out a car on the track, all the goons on the news were taking the turns wrong, I'd love to try and apex every one of them and bomb around.