A bistro was a small restaurant where food and beverages were served.
In early 2152, Ensign Hoshi Sato visited a bistro on Risa where she talked to a Risian couple and met Ravis. (ENT: "Two Days and Two Nights")
The Risan bistro was called as such on the call sheets of the episode. It was built on Paramount Stage 9.
In 2371, upon first entering the Chez Sandríne holoprogram, Harry Kim asked Tom Paris whether it was a "French bistro". (VOY: "The Cloud")
In 2374, a holographic Leonardo da Vinci considered moving to France and told Catarina about a tavern outside Paris, which he described as a "charming little bistro" offering a particular wine. (VOY: "Concerning Flight")