Addendum

That isn't an endorsement of anything else that goes on in Star Wars books. This is, though: People would definitely watch and bet on blob-racing if it existed.

Addendum

A major factor will be if the ships dock at a planet, an orbital station, or neither, instead sitting in deep space and receiving their passengers from shuttles. In the case of the station, probably a plain exterior will be demanded by the port authority, but in the third case, presenting customers with an awesome view during their approach will be advisable.

It's Never Too Early to Start Planning

When we have big interstellar cruise liners, will it be worth it to paint the exterior, or will people not care about the part they can't see? Or will they see it through drones set up so there can be races on the hull for gambling purposes, given that in space, anything goes? Only market research can determine the truth.

Addendum

And the upper crust will live outside the main superstructure too so it's harder to visit them, they get better views, and their debauchery is harder to interrupt? Unbelievable. The future really is something.

Ship Trip

In the future, when people are living on huge spaceships making circuits among all the galaxy's best places, do you think they'll hold the races inside or on the outside? What's that you say? On a track away from the hull but still attached to it so it's easier to see by the picnickers sitting on the hull? You're no ordinary speculator.

One Horsepower

The only two things keeping horses alive are rich people and racing. Once we have cheetahs genetically engineered to have a little staying power and congenial personalities, it's all over.