The Florida Keys have access to some of the freshest seafood in the country, making dining in this scenic archipelago a consistent pleasure. But unlike in, say, New Orleans or Charleston, there are very few dressy options. There is no need to bring a sport coat. Indeed, most venues don’t even require pants. Shorts are acceptable almost everywhere. Similarly, presentations tend to be unfussy, and portions are frequently large. Prices, however, are not necessarily commensurate with the casual atmosphere. It’s common to find main courses costing upward of $30, even in restaurants that seemingly haven’t seen a fresh coat of paint in decades.