A disc jockey is a person who mixes different sources of pre-existing recorded music as it is playing, usually for a live audience in a nightclub. Originally, the "disc" in "disc jockey" referred to gramophone records, and describe someone who mixes recorded music. DJs also create mixes, remixes and tracks that are recorded for later sale and distribution. DJs use equipment that can play at least two sources of recorded music simultaneously and mix them together. This allows the DJ to create seamless transitions between recordings and develop unique mixes of songs. Often, this involves aligning the beats of the music sources so their rhythms do not clash when they are played together, either so two records can be played at the same time, or to enable the DJ to make a smooth transition from one song to another.
A nightclub 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. Nightclubs typically aim at a niche market of music and dancing enthusiasts and clubgoers. Some nightclub bouncers do not admit people with ripped jeans or other informal clothing or gang apparel 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, such as house music.
A gramophone record, commonly known as a vinyl record or simply vinyl is an analog sound storage medium in the form of a flat polyvinyl chloride disc with an inscribed, modulated spiral groove. The groove usually starts near the periphery and ends near the center of the disc. Record collecting is the hobby of collecting sound recordings, usually of music. Although the typical focus is on vinyl records, all formats of recorded music can be collected. Record collecting has been around probably nearly as long as recorded sound. In its earliest years, phonographs and the recordings that were played on them were mostly toys for the rich, out of the reach of the middle or lower classes. By the 1920s, improvements in the manufacturing processes, both in players and recordings, allowed prices for the machines to drop.