There are so many reasons that geometry of a space ship matters from pressurization structural stability, acceleration stress, to deflection angle of space debris during travel.
Arkon and by extension Terran ships in Perry Rhodan.
Perry Rhodan also has something a bit like the Borg (but I'm pretty sure much older) called PosBis, and their ships are described as roughly cube shaped nightmares.
My friend in avorion spent countless hours designing incredibly cool, streamlined ships that had V wings and neatly spinning barbettes for weapons systems. He downloaded the fan-made recreations of popular sci-fi series.
...
I made cubes. I put square stone on top of square metal armor on top of reinforcing blocks, and threw everything into ever-expanding cubes. Once I got the auto-targeting weapons, I WAS the borg. It was beautiful.
Having spent way too long playing rimworld I’m pretty sure that’s a kitchen and cold storage space. The white thing on the exterior wall is the cooler, the middle room is the kitchen counter, the outer room that connects to the hall is a dining area.
The lack of doors direct from the cooler out is intentional because your people will cut through there if there’s a door and you’ll struggle to maintain temps and cleanliness, so your people are more likely to get sick.