Jazz clubs are usually a type of nightclub or bar, which is licensed to sell alcoholic beverages. Jazz clubs were in large rooms in the eras of Orchestral jazz and big band jazz, when bands were large and often augmented by a string section. Large rooms were also more common in the Swing era, because at that time, jazz was popular as a dance music, so the dancers needed space to move.
Jazz clubs are typically nightclubs or bars authorized to sell liquor. Historically, large spaces were used for jazz clubs during the Orchestral and big band jazz periods, when bands featured multiple musicians, including a string section. Similarly, during the Swing era, larger rooms accommodated the growing popularity of jazz as dance music.