The Paris Radiogenic Sweepstakes was a gambling contest organized by Tom Paris aboard the USS Voyager in 2372. For one replicator ration, crew members could try to guess what the radiogenic particle count would be the next day. The winner would take home all the collected rations, minus Tom's 10% "handling fee". If no one guessed correctly, the prize would continue to accumulate.
On the second day, the ship's computer reported that the particle density at the measured co-ordinates was 1415 particles per cubic meter. There was, again, no winners because Chakotay, who had caught wind of the sweepstakes, put an end to it and confiscated the prizes. (VOY: "Meld")