Musical groups are a common way of organizing musicians to create music. Choirs are a group of singers, usually singing in harmony, and typically have six members. QUARTETS are similar to choirs, but with four members. Bands are a larger group of musicians, usually playing instruments, and can range from five to twenty members. DUOS are two musicians playing together, while trios are three musicians playing together. Octets are eight musicians playing together, and sestets are six musicians playing together. Jazzbands are a type of band that plays jazz music, and typically have nine members.