RtS - you're lucky a passport worked for you. When I was in Chicago last year they wouldn't accept my friend's passport at the local supermarket on the grounds that it wasn't a state driver's licence and they didn't think they could accept it(?!?). After whingeing on for a while we got to see the manager who explained to the puzzled check-out guy that people from outside the area could buy beer too. We got pretty worried for a while. Then at another place they didn't ask me for ID, which I found quite annoying as there was a sign saying something like "We card all people who look under 30 years old". Thanks.