The Officer's Club is a lounge on Galactica where pilots and other officers can meet to relax and have a drink.
Each table has a bell in its proximity, so that officers can get the attention of their fellow patrons. Sometimes this means notifying the patrons that a drink is "on them" (TOS: "Lost Planet of the Gods, Part II").
Cain and Cassiopeia meet in the Officer's Club, where Sheba leaves in disgust after seeing them there. Sheba and Bojay later find Cain there, sharing their support of him even to the point of mutiny (TOS: "The Living Legend, Part I").
Civilians are known to frequent the club as an officer's guest. When Chameleon boards Galactica, Boomer and Apollo sit with him at a table, conversing about the Borellian Nomen who seem to pursue him (TOS: "The Man with Nine Lives").
During the release of Eastern Alliance prisoners, Tigh finds Apollo and Starbuck here, and informs them about the Council's orders, which prompt them to take a visit to the landing bay (TOS: "Baltar's Escape").
Notes
- In "Baltar's Escape," the bell is missing from the the table where Starbuck and Apollo are seated when Colonel Tigh mentions that they've lost all contact with the Prison Barge.