Question: Given the following context:  Rumours is the eleventh studio album by Anglo-American rock band Fleetwood Mac, released on 4 February 1977 by Warner Bros. Records. Largely recorded in California in 1976, it was produced by the band with Ken Caillat and Richard Dashut. The band wanted to expand on the commercial success of their eponymous 1975 album, but struggled with relationship breakups before recording started. The Rumours studio sessions were marked by hedonistic behaviour and interpersonal strife among band members, which shaped the album's lyrics. Recorded with the intention of making "a pop album", the album's music featured a pop rock and soft rock sound characterized by accented rhythms and electric keyboards such as the Fender Rhodes or Hammond B3 organ. The members partied and used cocaine for much of the recording sessions, and its completion was delayed by its mixing process, but was finished by the end of 1976. Following the album's release, Fleetwood Mac undertook worldwide promotional tours. Rumours reached the top of both the US Billboard 200 and the United Kingdom Albums Chart, and became the band's most successful release. The songs "Go Your Own Way", "Dreams", "Don't Stop", and "You Make Loving Fun" were released as singles, all of which reached the US top 10. Having won the Grammy Award for Album of the Year in 1978, Rumours has since sold over 40 million copies worldwide, making it one of the best-selling albums of all time, and has received diamond certifications in several countries, including the United States, Canada, and Australia. The album garnered widespread acclaim from critics, with praise centred on its production quality and harmonies, which frequently relied on the interplay among three vocalists and has inspired the work of musical acts in different genres. Often considered Fleetwood Mac's best release, it has featured in several publications' lists of the best albums of the 1970s and of all time. In 2004, Rumours was remastered and reissued with the addition of "Silver Springs", which had been excluded...  answer the following question:  What members partied and used cocaine for much of the recording sessions??
Answer:
Fleetwood Mac