Not many people realise that they need an international driving permit for America. I've been five times and hired cars using my British paper licence. Nobody at the hire companies batted an eyelid. The travel agents didn't say anything when we booked the fly drive holiday either.
It wasn't until I travelled to India that I knew the IDP even existed, when I read the list of countries requiring it, I nearly fell through the floor.
It isn't really a massive issue in India though. Anybody will hire a vehicle to you, I normally get a Honda 140cc scooter. All hire vehicles carry black number plates with yellow lettering, this tells the police that you're foreign and on a hired bike or car. That makes them pull you up immediately, where they then demand your licence. There's usually five of them in a Mahindra Jeep. The boss looks at your licence. If it's a British licence he fines you on the spot, usually demanding between £20 and £100. The trick is, you keep £10 in Rupees in one pocket, and the rest of your money somewhere else. Once you claim to have only £10, he'll take it and let you carry on. There's no receipt or threat of arrest, the money is used to buy them all lunch!
Once you get used to the corruption, and learn about the international driving permit, you hand it to him, this really pees him off, as he can't fine you and they have to pull somebody else. It doesn't even matter if you're drunk and you fall off the scooter, arresting you would be too much work!

The police in India must be very wealthy men.