It is strictly a gambling card game, whether it be Draw Poker penny ante style or Five Card Stud table stakes. Without the gambling factor it would be one of America's least-played games. 6. Each player, on his own, battles all the others. There is no partnership play. 7. It combines both chance and skill, and is the only game in which a player can win only one hand all evening and still come out a winner, or win many more than the average number of hands and still lose to the game's action.
If there is any more engrossing gambling card game for a group of reasonably congenial friends of fairly equal playing ability than Poker, I have yet to learn about it. The longest Poker session always seems too short.