A nightclub (also known as a discothèque, disco, dance club or club) is an entertainment venue and bar which serves alcoholic beverages that usually operates late into the night. A nightclub is generally distinguished from regular bars, pubs or taverns by the inclusion of a stage for live music, one or more dance floor areas and a DJ booth, where a DJ plays recorded music and where coloured lights illuminate the dance area. Another distinction is that whereas many pubs and sports bars aim at a mass market, nightclubs typically aim at a niche market of music and dancing enthusiasts and clubgoers. The upmarket nature of nightclubs can be seen in the inclusion of VIP areas in some nightclubs, for celebrities and their guests. Nightclubs are much more likely than pubs or sports bars to use bouncers to screen prospective clubgoers for entry. Some nightclub bouncers do not admit people with ripped jeans or other informal clothing as part of a dress code. The busiest nights for a nightclub are Friday and Saturday night. Most clubs or club nights cater to certain music genres.