The 4077th MASH Officers' Club was the social center of the camp where everyone could relax after a hard day's work. The club building, a permanent structure made of corrugated iron, was donated to the camp by Major General Maynard Mitchell in the Season 1 episode "Officers Only" as a gesture of thanks after the MASH had saved the life of his son.
The Officers' Club was located on the east side of the camp, near the motor pool. Next to it was a wooden stage, with the Commander's tent and the hospital building beyond.
Originally, the custom of the Club was to admit officers only but a new tradition was set during the opening ceremony of the club in the episode "Officers Only" where it was decided that relatives and family of officers could also be admitted. And since Hawkeye considered everyone in the camp as his family, everyone could get in.
The decor of the Officers' Club changed as the series progressed but key features were a bar where drinks were served, a juke-box, two slot machines, a pinball machine and a piano.
The Officers' Club featured heavily in a number of episodes besides "Officers Only". In "Henry in Love" (Season 2), Henry Blake brought the girl he had met in Tokyo, Nancy Sue Parker, a former cheerleader, to the club where she performed a cheer routine to music from the jukebox. In "Your Hit Parade" (Season 6), the club became a temporary ward when the MASH suddenly had to cope with a influx of wounded. In "The Grim Reaper" (Season 6), Hawkeye decks Colonel Victor Bloodworth in the O. Club. In "The Best of Enemies", the O. Club is the scene of the bridge competition between Potter, Winchester, Margaret and B.J.