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 venues are usually nightclubs or bars licensed to serve alcohol. In the past, jazz clubs were often held in large halls during the Orchestral and big band jazz eras, 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.