Off West End refers to theatres in London which are not included as West End theatres. The term emerged relatively recently, having been coined after the similar American term "off-Broadway". The term is usually used synonymously with the more widespread term fringe, but sometimes is also used to refer to more mainstream or commercial theatre which is located within London but outside the centre, or to especially small and non-commercial theatres located within the centre. According to London Theatre, "Smaller theatres, including many pub theatres, are called fringe, although some of these small theatres are also called off West End, particularly those located in the West End of London, where most of the big commercial theatres are. These small theatres can vary in size, with seating capacities of around 40 to 400."