A concert is a Live performance, usually of music, before an audience. The music may be performed by a single musician, sometimes then called a recital, or by a musical ensemble, such as an orchestra, a choir, or a musical band. Informal names for a concert include "show" and "gig". Concerts are held in a wide variety of settings or venues, including pubs, nightclubs, houses, barns, dedicated concert halls, entertainment centres, large multipurpose buildings, and even sports stadiums. A concert held in a very large venue is sometimes called an arena concert. Regardless of the venue, musicians usually perform on a stage. Before the dominance of recorded music, concerts would be the only opportunity one would generally have to hear musicians play.   Wikipedia