From the publisher's website:

You and your adventuring companions have spent all day slogging through the dungeon, killing monsters and taking their stuff. What are you going to do with all the loot? “Gambling,” you say? Well, “I’m in!” The Red Dragon Inn: Gambling? I’m In! includes the rules for nine different gambling games inspired by the world of The Red Dragon Inn, plus the specialized Rogues and Warriors Deck required to play them. The games in Gambling? I’m In! can be played on their own. They can also be combined with The Red Dragon Inn to replace the usual Rounds of Gambling with actual gambling games!