Max number of people they take is eight per class and the eight is divided into two groups so there are never more than four karts on the track at once. At first I was bummed about this, but then realized I needed the recovery time between sessions.
I did the "Ultimate Shifter Kart Experience." My wife paid $329. It ran from 6-9pm. One step down is the "Shifter Kart Experience" for $249. Only difference is one more lapping session for the Ultimate. The other two guys in my group did not pay for the extra session so I had the track to myself... until one of the instructors suited up and came out on track. That was pretty cool as I got a first hand demonstration on how fast I was NOT driving.
Beginners Karting | Bondurant.com