Many places offer 1 to 1 rates so don't worry about it. Stay away from the Italian place in Orient Village. They really took advantage of me on Christmas eve as to exchange rates. I guess I should have been more aware and simply avoided the place. My favorite restaurant of the trip was Yellow Sub and they did 1 to 1.
Kim, I just wasn't paying attention and used dollars to pay. My complaint is that at every other place I went the staff made it abundantly clear how to pay to get the best deal. I know the Italian place didn't do anything illegal but all of the other places I went made sure to give me the best rate. So that's why I felt taken advantage of. Like I said I should have done my part to be aware.