There is a company that does mystery shopping at jewelry stores in port. I was emailed about one a couple years ago, but I do not remember what the name of the company was. It sounded quite intense! I believe there were several shops at each port. I just couldn't imagine dashing around to all those shops and getting all the who's, what's, when's, where's, why's and to what extents during the limited time on land! But they covered the cruise... But still, I could not imagine having a relaxing cruise!
TinaMarie