Cocktail party

A cocktail party is a type of gathering or social event which usually centered around the serving of cocktails or other beverages.

In late 2265, a woman that Leonard McCoy had previously involved with sent him a message, inviting him to accompany her to a cocktail party on Alcatraz. As the two weren't an item any more, and because he hated cocktail parties, he sent her a declining message. 

Doctor Thomas Leighton and his wife Martha hosted a cocktail party at their home on Planet Q for the Karidian Company of Players in late 2266, in an effort to gain information about Anton Karidian, whom Thomas believed was Kodos the Executioner. 

Admiral Arlen McAteer hosted a cocktail party for all the command personnel in his sector on Starbase 32 in 2333. 

In 2369, the Wadi held a cocktail party in the third shap of their Chula game aboard Deep Space 9.