Officers' club

An Officers' Club, colloquially known as an "O-Club", is a bar and lounge aboard UNSC vessels, and presumably on many UNSC bases. This is forbidden territory to all crew on board aboard vessels, save those who were commissioned officers. Officers clubs located on starships included a table for dining/conversation, a full bar, and many pictures involving the ship, which may include pictures of the ships captain, the ships creation, its crew, it in battles, or anything involving its name. In example, the Officers Club on the UNSC Gettysburg contained a daguerreotypes displaying the battle of Gettysburg in the American Civil War, for which the ship is named.

Trivia

 * The Gettysburg has the only mentioned O-Club. Where it had a massive table of oak, scored with numerous gouges and scorches from a hundred cigars casually set upon its surface. There was a bar stocked with bottles containing a rainbow collection of liquors. It also housed the UNSC gold-fringed blue flag. Along with photos of Past Officers and Captains of the Gettysburg. And a tin Civil War daguerreotypes that displayed the battlefields full of charging men and cavalry and cannons.
 * The Gettysburg is the only known ship to have an officers club, however, it would appear that it may be standard on most ships, but has not been visual in any media so far.