The Sci-Fi Dungeon

 You don't have to choose.  These are all shots from a dungeon originally built for straight-up dungeon crawls.  By avoiding permanently affixed fantasy elements, you can change the whole look of the place with just a bit of scatter terrain.

The power core columns are blue wooden dowels normally used to hold the upper bunk of a bunkbed in place.  Painted with a blue glow effect and capped with washers, they would fit right into any engineering section.

Here you can see my rounded terminals with green screens, which are simply wooden plugs that cover up countersunk screws. Washers and paint make them a kiosk for all sorts of IT purposes.