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cover band

n. (context music English) A band that plays mostly or exclusively cover song.

Wikipedia
Cover band

A cover band (or covers band), is a band that plays mostly or exclusively cover songs. New or unknown bands often find the format marketable for smaller venues, such as pubs, clubs, or parks. The bands also perform at private events, for example, weddings and birthday parties and may be known as a wedding band, party band, function band or band-for-hire. A band whose covers consist mainly of songs that were chart hits is often called a top 40 band. Some bands, however, start as cover bands, then grow to perform original material. For example, The Rolling Stones released three albums consisting primarily of covers before recording one with their own original material.

Cover bands play several types of venues. When a band is starting out, they might play private parties and fundraisers, often for little or no money, or in return for food and bar privileges, although many professional musicians refuse to do this. With enough experience, a band will begin to "play out" professionally at bars and night clubs. Some cover bands are made up of full-time professional musicians. These bands are usually represented by an 'entertainment agency'.

Unlike some famous bands, when the cover bands consist of professional musicians they often do not have a 'fixed line up' of musicians, rather they are often made up of a flexible line up of session musicians, utilizing "dep" (deputy, that is, stand-in) musicians where necessary. The music industry is considered by many musicians as a relatively difficult industry to make an income in, and cover bands can be a good source of income for professional musicians alongside other work.