I've got a car show upcoming next month & looks as though I'll get to hit it a couple of days. I'm assuming you are allowed to bring cameras into the show?? It looks as though this may be a blatant chance to get pictures where no one will the wiser! Is this the case?
I don't know really what are the rules in the States about making photos at public places, but here in Europe you wouldn't be asked if you are making photos at a car show, boat show or any other technical related show. There are dozens of people doing that. Even from time to time you can see somebody one or more girls to pose for him. Then the girls just make a pose & smile and that's it. AT fairs with other kind of topics, surely taking photos are more weird thing so than you would get strange looks from the hostesses (although I have made vids at every kind of fairs) - so it is definitely close to risky.