These are examples of the most casual men’s shoes available. The espadrilles are for the beach and beach bar or perhaps fishing. Birkenstocks are very casual and usually worn kicking about a beach community. Although, I did work with one man that wore them to work. He was the owner and had a load of money so I guess, he could wear Birkens to work. Boat shoes should never be worn on a boat. They are the shoe you wear when you are trying to say, “I’m serious, but I’m here to party, too”, then boat shoes are for you. Flip flops are very casual, unless you live in Florida. In Florida, we have formal flip flops and casual flip flops. I’m not joking.