Yes, they do develop 35 mm film as well at the APS (advantix) film and disposable cameras.
I always try to get all of my film developed onboard so I can see how my pictures turned out and which pictures to purchase from shutters.
In fact, I spent so much money at Shutters that I received a wonderful "magical moments" certificate from them at the end of the cruise, along with a signed picture of the ship by the captain and an autographed Mickey picture to my family.
Sue Ellen