The grape was a fruit from Earth with a sweet taste. Typically grown in a vineyard, grapes came in red and white varieties. Wines (and non-alcoholic grape juices) were products made from grapes.
Groppler Zorn offered William T. Riker a bowl of Earth fruits, including grapes and bananas, when he visited Zorn in the old Bandi City. (TNG: "Encounter at Farpoint")
The Picard family vineyards, located in La Barre, France, grew grapes for wine production. (TNG: "Family", "All Good Things...")