Quark's Bar, Grill, Gaming House and Holosuite Arcade was the multi-level, vibrant and popular central attraction of Deep Space 9's Promenade, drawing crowds of travelers and station inhabitants with its offerings of drink, food, gossip, gaming and fantasy fulfillment. The proprietor of the establishment was Quark, a Ferengi entrepreneur and sometimes petty criminal who was the eternal thorn in the side of the station's Chief of Security, Odo. Despite his dalliances on the wrong side of the law Quark was a capable and amiable host, and the bar was usually one of the most popular places for recreation on the station.
Business in Quark's was conducted in gold pressed latinum. The bar sometimes featured live music, and occasionally offered cut-price drinks during happy hour. According to a very small sign above the main entrance, the establishment was not responsible for the loss of any personal items.
In the aftermath of the Cardassian withdrawal, the Bajoran Provisional Government invited Starfleet to take over administration of the station. Desperately in need of a way to bind the station's remaining inhabitants together and transform it from a place of suffering and slavery into one of peace and prosperity, new station commander Benjamin Sisko persuaded Quark to stay and re-open the bar, effectively becoming a community leader. Quark's duly re-opened and soon filled the Promenade with the sound of laughter and music; the newly-christened "Deep Space 9" had found its heart.