Special group samba schools are allowed to bring to the Samba Parade from three to five thousand members each. They are divided in wings or sections, with groups of people wearing the same costume. The term in Portuguese is alas. Wings weave a human tapestry of intricate colors and movement as they make their way through the samba runway. Some have a special choreography. Others just ask their members to do the samba, and sing the theme as they march along.