Grog, a kind of alcoholic drink, was available at the Alcazar cantina on the planet Akiva, along with ale and starfire 'skee. This was not long before the Rebellion on Akiva took place. The bartender working at the cantina offered the beverage to Sinjir Rath Velus, a former Imperial Loyalty officer, when he visited Alcazar, but Velus opted for the 'skee instead. A can of Grog was used by Dooku as a diversionary tactic against a guard.
The existence of Grog within the Star Wars universe was initially established in Star Wars Legends through the novel Han Solo at Stars' End by Brian Daley, published in 1979. Its presence in canon was later validated by the novel Aftermath, authored by Chuck Wendig and released in 2015.