A "Krewe" is a social organization that plays a significant role in the celebration of Mardi Gras in New Orleans. Each Krewe organizes parades, balls, and other festivities, often featuring elaborate floats and costumes. Members of a Krewe typically share a common theme or purpose, and they often participate in the planning and execution of events. Krewes can vary in size and focus, with some being more family-oriented while others may have a more exclusive membership. Many Krewes have a rich history and tradition, often dating back to the 19th century, contributing to the vibrant culture of New Orleans during the Mardi Gras season.