Being a Non-US citizen I am always unsure on how much I am expected to tip for cetrain services when I am in Las Vegas. Last spring I was Vegas and visited Battlefield Vegas (which is a shooting range for rare guns). I tipped the instructor 20$ - he was nice and did a good job. There was also a driver. He picked up all the guests form the hotels with a military truck and drove them back when they were finished. When I was picked up, the truck was completely full (there was a big, loud group of college kids), but on my way back I was the only passenger. The driver was a nice guy and tipped him 10$. Later I felt that maybe I should have tipped him 20$, but I wasn't sure. So here is my question: Was 10$ an appropriate tip for the driver?