As a general rule, most of the rooms in the Silent Wanderer had very few furnishings so as to use up as little space as possible. The main hall, where Lex was pacing, for example, only had a few sofas which were attached to the walls and a circular table that could retract into the floor.
On the roof there was a small module that could create projections anywhere in the room, and was hooked up to the main ship computers. This way, any information they wanted could be pulled up directly, anywhere in the room. The projections could even be interacted with.
The walls had silverish-gray plates with lights in between the grooves, but they could undergo a change to display the space around the ship, turning the entire room into a massive display.
These were nice features, but besides that the room was completely empty. It was not bad, since that would allow Lex to use the space however he wanted. Currently, that was as an empty room for him to roam mindlessly in.