On the surface, the cities of Caseville, in winter-logged Michigan, and Key West, in sun-soaked Florida, don’t have much in common. Look a little closer and similarities start to emerge. They’re both beach communities. They’re both situated at the tips of peninsular states. They both rely strongly on the tourism industry. And for the last 17 years, they’ve both claimed the world’s most prodigious beach bum as their patron saint.