Betting pool

Betting pools are a form of gambling which involves betting on the outcome of both gaming and non-gaming events.

In 2364, Worf noted to Natasha Yar that she was heavily favored in the ship's pool during her martial arts competitions against Science Officer Swenson and Lieutenant Minnerly. Surprised that Worf bet on her he stated that it was "a sure thing." (TNG: "Skin of Evil")

Quark was often heading up betting pools for events on and around Deep Space 9.

In 2370, Quark created a betting pool on a game of racquetball between Julian Bashir and Miles O'Brien. The competition was slated as "the grudge match of the galaxy" featuring "the Mechanic versus the Doctor." Quark, who served as their exclusive promoters, offered to donate half of the house's winnings to the Bajoran Fund for Orphans. Prior to the competition, it was revealed that all the bets were on Bashir. Quark attempted to pursuade Bashir to throw the game into O'Brien's favor, stating that if Bashir won, then there would be no profits to donate. (DS9: "Rivals")

Quark also often ran a popular pool, which he called the "Manhunt Pool", whenever any unusual crimes were committed on the station. This allowed people to bet on how long it would take Odo to apprehend the guilty party. (DS9: "Crossfire")

While in a coma, Bashir was trapped inside his mind, with the station representing his body and various people representing parts of his psyche. Naturally, Quark represented his greed and took bets on everything from which organ would fail to how long the doctor had to live. (DS9: "Distant Voices")

In 2375, a betting pool was established on when the missing Ezri Dax and Worf would return to the station. Morn won the pool by guessing the exact day of their return and by missing their arrival time by only two hours. (DS9: "The Changing Face of Evil")

Following the end of the Dominion War and the death of Winn Adami, Quark's weekly betting pool was one who the next Bajoran kai would be. Quark considered it a wide open field, but noted that the smart money was on Vedek Ungtae. Upon learning this, Kira Nerys imposed an immediate station regulation that made betting pools of any kind illegal. She reinforced the regulation by stating that if she caught anyone making a bet on the station, Quark would spend 15 days in a holding cell. (DS9: "What You Leave Behind")