A nightclub is a type of entertainment venue that is open at night, usually for drinking, dancing, and other forms of entertainment. Nightclubs typically have a bar and a dance floor, with a discothèque, laser lighting displays, and a stage for live music or a disc jockey (DJ) who mixes recorded music. Nightclubs tend to be smaller than live music venues like theaters and stadiums, with few or no seats for customers. Nightclubs often focus on a specific genre of music, such as "retro music night" or a "singles night".

Nightclubs are different from bars in that they emphasize experiences and entertainment, which includes selling alcohol. While bars tend to serve mainly beer, local craft brews, and more basic drinks, nightclubs concentrate more on serving high-end cocktails, fine wines, and upscale spirits. Most nightclubs are at least a bit more formal than bars, and many clubs charge cover fees or require a membership before entry. Nightclubs focus more on music, entertainment, and the overall aesthetics of the experiences they offer their clientele.

In summary, a nightclub is a type of entertainment venue that is open at night, usually for drinking, dancing, and other forms of entertainment. Nightclubs typically have a bar, a dance floor, and a discothèque, and they often focus on a specific genre of music. Nightclubs are different from bars in that they emphasize experiences and entertainment, and they tend to be more formal and upscale than bars.