The Earth card game played regularly by the senior officers of the Enterprise-D in Riker's quarters, a recurring setting used to show the crew off duty.
Poker, usually five-card stud or draw, is the regular social fixture of the Enterprise-D senior staff. Riker is the acknowledged master of the bluff, Data struggles at first with the idea of deception, and Worf, Troi, Crusher, La Forge and others take turns at the table.
The game is first shown in the Next Generation episode The Measure of a Man and recurs through the series. It features in Cause and Effect, where the repeating hands help reveal a time loop, and in Descent Data plays a holodeck game with Newton, Einstein and Stephen Hawking.
In the finale All Good Things..., Picard joins the game for the first time and regrets not having done so sooner. The reunited crew are playing again at the close of Star Trek: Picard.