Old-fashioned Music Hall is a term used to describe a type of entertainment venue popular in the late 19th and early 20th centuries. The term is derived from the Greek word 'ODEON, ' which means 'a building for musical performances.' Odeons were typically large, ornate buildings with a stage, seating area, and a bar. They were often used for variety shows, vaudeville acts, and other forms of live entertainment. Odeons were popular in many cities across Europe and North America, and they remain a popular form of entertainment today.