Funk metal is essentially a fusion of heavy metal and funk. It started off in the late eighties as a subgenre of alternative metal, and was heavily influenced by bands such as Red Hot Chili Peppers and Fishbone. Funk metal bands often use a conventional riffing style influenced by 1980s thrash metal, unlike bands from other alternative metal genres. During the late-'90s, many bands which started out as funk metal branched out into more commercially viable genres, such as alternative rock and nu metal. Notable funk metal bands include Living Colour, Infectious Grooves, Mordred, Primus, and Rage Against the Machine. The biggest regional scene during funk metal's prime was San Francisco.