The number of wedding bands is not fixed, but generally determined according to the style, venue, budget and music demand of the wedding. Generally speaking, however, the number of wedding bands is between 2 and 5, which can meet the music requirements of most weddings without occupying too much space and cost. The number of wedding bands will also affect the musical style and expressive force of the bands. Generally speaking, the more people there are, the more diverse the tracks and styles the band can play, and the richer the sound and effect. But the more people, the more equipment and coordination, which may also increase noise and confusion. To sum up, how many people a wedding band needs depends on the specific situation.