A very long time ago I had a Sailboat with an aft cabin. Nowadays there is always a "walkthrough" to the aft cabin from the main cabin, but in the "olden days" this was often not the case.
As a result the cabin was seldom used for anything but storage. We would "clean it up" for company to use but preferred the forward cabin because the aft cabin was too "cave like."
I believe Jay's use of the term "sailboatish" is very appropriate, and in this context implies an oddity more often found on sailboats than power boats.