To answer the question, everywhere in the U.S.
Be careful. Think "pickpocket" instantly first if you should encounter any of the symptoms, such as having ketchup spilled on you. Since pickpockets often work in pairs, you are better off when traveling with someone else to help.
Fortunately I have not been a victim ... yet.
Travel tips:
http://members.aol.com/ajaynejr/travel.htm