Poker

Poker is a game originating from Earth in which players gamble in an attempt to gain more money. Las Vegas is widely associated with poker.

Alternate realities

 * In an alternate reality, a Wraith survivor from a Hive ship played poker in Las Vegas to win money, in order to fund his way to communicate with his fellow Wraith in Pegasus, and alert them to Earth's location. He managed to win by using his telepathy.