When I was a PO2/PO1 (E5/E6), I was in the weirdroom wardroom often, getting papers signed. If there wasn’t a meal or other meeting, I just rapped on the door (usually as I walked through it), got the signature(s) I needed, and walked back out.
It’s like the mess decks in that it’s where the officers eat, study, hold training, and lounge about watching movies/playing cribbage/&c.
I’m sure the wardroom on a skimmer is nowhere near as informal.