George Vital "Papa Jack" Laine (September 21, 1873 – June 1, 1966) was a pioneering band leader in New Orleans in the years from the Spanish-American War to World War I. He is often credited with being instrumental in the development of jazz music as his Reliance Brass Band was the first to fuse European, African and Latin music together, and the earliest jazz musicians can be traced back to playing within the Reliance Brass Band or being influenced from those who had.
Many of the New Orleans musicians who first spread jazz around the United States in the 1910s and 1920s got their start in the Laine bands. Laine was a drummer, but was more noted for his skills at arranging and booking bands. Laine's musicians included individuals from most of New Orleans' many ethnic groups such as African American, English, French, German, Italian, Jewish, Latin American, Scottish etc. Laine started leading bands in 1885 before the Jim Crow codes went into effect in New Orleans. Due to the diverse background of many of his bands members such as their cultural background, socioeconomic status, age variations from young to old as well as musical experience (some having none at all) a broad range of ideas were developed and fused together leading to the early beginnings of jazz music.
Even after segregation laws started demanding "whites" and "colored" be kept separate, Laine continued to hire light- and medium light-skinned African-American musicians, claiming that they were "Cuban" or "Mexican" if any segregationist tried to start trouble. He believed music brought people together.
Laine retired from the music booking business by 1920, but he was interviewed a number of times, providing first hand accounts of the early days of the development of New Orleans jazz. He had hired well over 100 musicians to play in his bands.