Kambol go-karting track is great fun for a group (maybe a substitute adrenaline-booster if you don't fancy the idea of the shooting range). 10 USD buys 10 to 15 minutes, cars are pretty speedy!
Head out of town, about 10 minutes after the airport, opposite side of the road.
Video now on YouTube: www.youtube.com/watch?v=8fQZBBUB8_A