In the context of the Naruto series, events like Tsunade's Jungle Party serve multiple purposes. They offer a break from the intense plotlines involving battles, character deaths, and the overarching narrative of good vs. evil. These lighter moments are crucial for character development, allowing fans to see their favorite characters in different settings and scenarios. For Tsunade, such events highlight her multifaceted personality, moving beyond her roles as a powerful ninja and leader.
known for her terrible luck—so maybe the person with the worst luck wins a prize. Jungle Sake Bar
Canonically, Tsunade is described as a "hard-drinking party girl" and an avid gambler.