Generally darkly lit, the room was dominated by a large, curved table and an elaborate chandelier-type ornament affixed to the ceiling. The bulkhead opposite the windows featured painted portraits of several historical figures. The mess aboard the USS Enterprise-A displayed portraits of Abraham Lincoln of Earth and Sarek of Vulcan.
In 2293, Captain Kirk and his crew hosted a dinner for the Klingon Chancellor Gorkon and his party in the officer's lounge aboard the Enterprise-A while escorting Kronos One to a planned, but never held, peace conference on Earth.
Located within the primary hull of the Constitution-class starship, the officer's mess aboard the Enterprise-A was completely destroyed when the hull of that ship was compromised during a space battle in 2293. (Star Trek VI: The Undiscovered Country)