Ushhers' milieus refer to the environment in which ushers work. Ushers are responsible for providing assistance to patrons in a theater, concert hall, or other entertainment venue. They typically greet guests, help them find their seats, and answer any questions they may have. Aisles are the pathways between rows of seating in these venues, and ushers often patrol the aisles to ensure that guests are following the rules and regulations.