What is the allegory of the club?

While the Mahabharata is full of allegorical tales meant to demonstrate some ethical conundrum or dictate a moral, "The Clubs" is the only book in the epic almost entirely dedicated to one such allegory. It portrays the Vrsnis, who face imminent destruction by Time and descend into a sinful free–for–all. They cast aside all decorum and dharma, committing to drunkenness and violence as the world turns increasingly bizarre around them. The story illustrates an apocalypse, allegorically depicting how the world is turned upside down when societies decide to live in defiance of virtuous and dharma. Contrast this allegory with the elders descended from Bharata who assent to their demise by choosing to live out their days as ascetics in the forest hermitage.