Fluid is the name of at least five bands: 1) The Fluid were an American grunge band, from Denver, CO, formed in 1984. The Fluid were originally called Madhouse, and became The Fluid upon the arrival of vocalist John Robinson. Their first show drew a large crowd of around 400 people, and they released their first album in 1986, "Punch N Judy". It was The Fluid live show that set them apart from many other Denver punk bands in the mid-1980's. Part MC5