Music halls were popular entertainment venues in the 19th and early 20th centuries, primarily in Britain. They featured a variety of performances, including singing, dancing, comedy, and theatrical acts. These venues provided a space for both professional entertainers and amateur performers, making them accessible to a wide audience. The atmosphere in music halls was lively and informal, often encouraging audience participation. Many famous performers, such as George Formby and Marie Lloyd, began their careers in these halls. Over time, the popularity of music halls declined, giving way to other forms of entertainment like cinema and television.