Question: Portishead and The Replacements, are which type of musical organization?

Context articles: United States Army Field Band
The Replacements (band)
League of American Orchestras
Argonotes
San Francisco Lesbian/Gay Freedom Band
Oratorio Society of New York
Portishead (band)
Stoughton Musical Society
Handel and Haydn Society
David W. Tucker

The United States Army Field Band of Washington, D.C. is a touring musical organization of the United States Army.
 Each year, the Army Field Band performs more than 400 concerts and makes thousands of appearances before audiences of all ages.
 From America's largest cities to her smallest heartland communities, "The Musical Ambassadors of the Army" tell the story of the Army.
The Replacements were an American rock band formed in Minneapolis, Minnesota, in 1979.
 Initially a punk rock band, they are considered pioneers of alternative rock.
 The band was composed of the guitarist and vocalist Paul Westerberg, guitarist Bob Stinson, bass guitarist Tommy Stinson and drummer Chris Mars for most of its career.
 Following several acclaimed albums, including "Let It Be" and "Tim", Bob Stinson left the band in 1986, and Slim Dunlap joined as lead guitarist.
 Steve Foley replaced Mars in 1990.
 Towards the end of the band's career, Westerberg exerted more control over the creative output.
 The group disbanded in 1991, with the members eventually pursuing various projects.
 A reunion was announced on October 3, 2012.
 The Replacements never had significant commercial success, except for "I'll Be You", which hit number 1 on the "Billboard" Alt Rock chart, but they influenced numerous alternative rock acts.
The League of American Orchestras, formerly the American Symphony Orchestra League, is a North American Musical Organization consisting of a network of approximately 800 orchestras.
 “Dedicated to helping orchestras meet the challenges of the twenty-first century,” the League consists of leading symphony and philharmonic orchestras, collegiate orchestras, community ensembles, and youth and student ensembles.
 The only national organization devoted and focused on elevating the orchestra industry, the League was founded in 1942 and later chartered by Congress in 1962.
 The League creates a network of all facets of the industry, including administrators, managers, board members, business partners, volunteers, and musicians.
 Each year this organization presents two awards: the Gold Baton Award and the Helen M. Thompson Award.
 The League affects the orchestral world through several outreach experiences, dedicated advocacy to music education and especially orchestral education, and maintaining and communicating a breadth of information and pertinent topics in publications.
 It has also developed detailed antitrust policy and guidelines in order to comply with the landscape of the industry.
 The League is a leading force in work on legislation regarding orchestras and support for the arts.
Argonotes, the unofficial band of the Toronto Argonauts is an all volunteer organization committed to bringing quality musical entertainment and a "traditional football atmosphere" to all Argonauts home football games.
 Comprising more than 50 musicians on most game days, Argonotes is the largest musical organization associated with the CFL.
The San Francisco Lesbian/Gay Freedom Band (SFLGFB) is a community-based concert and marching band in San Francisco.
 It is the official band of San Francisco.
 Founded in 1978, it was the first gay-oriented musical organization in the world.
 The band promotes visibility and musical education for the Bay Area's lesbian, gay, bisexual, transgender and intersex (GLBTI) communities.
 Although a majority of its members are GLBTI, many are heterosexual and join to support the GLBTI community and to partake in a high-quality community concert and marching band.
 The SFLGFB presents musical programs that help to build understanding between GLBTI and other communities.
The Oratorio Society of New York is a not-for-profit membership organization that performs choral music in the oratorio style.
 The Society was founded in 1873 by conductor Leopold Damrosch and is the third oldest musical organization in New York City.
 The Society had a prominent role in the building of Carnegie Hall.
 Throughout its long history, it has premiered many new choral works.
Portishead are an English band formed in 1991 in Bristol.
 They are often considered one of the pioneers of trip hop music.
 The band are named after the nearby town of the same name, eight miles west of Bristol, along the coast.
 Portishead consists of Geoff Barrow, Beth Gibbons and Adrian Utley, while sometimes citing a fourth member, Dave McDonald, an engineer on their first records.
Organized in 1786, the Stoughton Musical Society is America's oldest performing musical organization.
 For over two centuries it has had many distinguished accomplishments.
 In 1908, when incorporated under the laws of the Commonwealth of Massachusetts, the name was changed to Old Stoughton Musical Society and it has retained that designation.
The Handel and Haydn Society, familiarly known as H+H, is an American chorus and period instrument orchestra based in Boston, Massachusetts.
 Founded in 1815, it is the third oldest musical organization in the United States after the Stoughton Musical Society (founded in 1786) and the U.S. Marine Band (founded 1798), and the oldest continually performing arts organization in the United States.
David W. Tucker (1929–2003) was a jazz trombonist, music educator, composer of band and orchestral music, record producer, and marching band arranger, most renowned as the director of the University of California Jazz Ensembles from 1969 until 1985.
 Under his direction, the organization expanded to become the largest musical organization on the campus of the University of California, Berkeley, had an international reputation resulting from foreign tours, and sponsored the Pacific Coast Collegiate Jazz Festival.
 Numerous student members of the organization have become renowned jazz musicians, composers, and music educators.