A samba school () is a dancing, marching, and drumming (Samba Enredo) club. They practice and often perform in a huge square-compounds ("quadras de samba") and are devoted to practicing and exhibiting samba, an Afro-Brazilian dance and drumming style. Although the word "school" is in the name, samba schools do not offer instruction in a formal setting. Samba schools have a strong community basis and are traditionally associated with a particular neighborhood. They are often seen to affirm the cultural validity of the Afro-Brazilian heritage in contrast to the mainstream education system, and have evolved often in contrast to authoritarian development. The phrase "escola de samba" is popularly held to derive from the schoolyard location of the first group's early rehearsals. In Rio de Janeiro especially, they are mostly associated with poor neighborhoods ("favelas"). Samba and the samba school can be deeply interwoven with the daily lives of the shanty-town dwellers. Throughout the year the samba schools have various happenings and events, most important of which are rehearsals for the main event which is the yearly carnival parade. Each of the main schools spend many months each year designing the theme, holding a competition for their song, building the floats and rehearsing. It is overseen by a carnavalesco or carnival director. From 2005, some fourteen of the top samba schools in Rio have used a specially designed warehouse complex, the size of ten football pitches, called Samba City (Cidade do Samba) to build and house the elaborate floats. Each school's parade may consist of about 3,000 performers or more, and the preparations, especially producing the many different costumes, provide work for thousands of the poorest in Brazilian society. The resulting competition is a major economic and media event, with tens of thousands in the live audience and screened live to millions across South America.
Carnival parade
The formal parades ("desfiles") during carnival, are a showcase of each main schools, enhanced by the participation of celebrities, fans and guests who often pay large sums of money for their elaborate costumes. In Rio de Janeiro, São Paulo and Porto Alegre, the formal parades are held in specially constructed arenas called Sambadromes (Sambódromo da Marquês de Sapucaí in Rio, the Anhembi Sambadrome in São Paulo) designed by influential architect, Oscar Niemeyer, the Sambadromo Complexo Cultural Porto Seco in Porto Alegre and the Sambadromo de Uruguaiana in Uruguaiana where "escolas de samba" from Brazil and their counterparts in Uruguay and Argentina (known as escuelas de samba) participate. Sambadromes are designed to accommodate all social classes, with VIP lounges, tourist sections, and various types of seating right down to cheapest seats for poorest sections of the community. Those who choose to only watch the parade may also be charged for the best seats.
Each school displays glamour with colorful costumes and floats with special effects and is organized into different segments or "alas" (sections). The "alas" represent different components of the school's theme, or "enredo", as they act out an homage to a myth, historic event or figure, or express their view on a social, environmental, or international issue. The "alas" display distinct costumes ("fantasias") and also reflect traditional samba school roles developed years ago. Thus, each samba school parade has the "comissão de frente" (first artistic ensemble), individuals who open the parade by walking in social attires, saluting the crowds; the "ala das Baianas", or the traditional segment of Bahian African-Brazilian ladies with impressive round dresses spinning through the avenue; the "interpretes" (formerly "puxadores") (lead singers) singing the "samba-enredo" or theme-song while they play the "cavaquinho" or other string instruments; the "velha guarda", veterans of the school; the "bateria", or samba band with drums, "cuicas" and other instruments, preceded by the "madrinha da bateria", band godmother who is often a sexy female celebrity. The "porta-bandeira" (female flag bearer), and the "mestre-sala" (male dancing partner) display and honor the school's flag, as they dance and strive to show harmony and samba expertise, while their performance is carefully observed and scored by the judges.