We will be on the NCL Star in Sept. and are booking Franks' massage tour in Mazatlan. We are four couples and the ladies will go for massages at the end of the tour while Frank deposits the men folk at a resort. He is going to call for us when our massages our through.
I've not met him, but from all his posts, and his emails to me, it is obvious that he truly wants you to have an enjoyable time in his city.
I think if you are travelling solo you can still join one of his groups.
If nothing else, he will be happy to tell you how to get the most of your day on your own. He's a very nice man.