A tavern is an establishment that sells foods and beverages.
In 2370, Jean-Luc Picard and Beverly Crusher were told to head for a tavern in Ohn-Kor. (TNG: "Attached")
In 2372, Kor visited a tavern on Torna IV, where he became drunk and told the other customers about gaining the Shroud of the Sword and how it would lead him to the Sword of Kahless. Toral, son of Duras was also in the tavern at the time. (DS9: "The Sword of Kahless")
Graife's establishment in "Honor Among Thieves" was described in the script as being a tavern.