You know what would be a good concession is to rent touring/cruiser bikes with baskets right there at the docks for the tourists. I guess there would be all kinds of liability insurance involved, and theft protection, but what a potentially lucrative business, especially if you offered guided tours. (Kind of like Bob's snorkeling gear, which you can rent all over Hawaii.)
Or to be the bike wrangler on the ship itself who manages the bike lending at each port of call...you'd get to travel all over and maintain the bike fleet. Could be a lot of fun for an adventurous wrench.
Roxy
Getting in touch with my inner try-athlete.