Located directly behind the bridge, this lounge was a social gathering place for the bridge crew to relax while off-duty. A relic of the time when Potemkin was originally commissioned, these sort of officer's lounges were common on starships up until the early 24th century. Newer starship designs more often use this space as a large conference lounge instead, with the bridge crew encouraged to socialize in common areas alongside the rest of the crew. Potemkin maintained the older arrangement, with a dedicated briefing room on deck 2 instead. As Captain Bertrand once put it, "this makes better use of the view".
(The exterior Excelsior-Class model used was made by Chris Kuhn.)