From time to time, variations enter the market, such as non-smoking and alcohol-free nightclubs. Also, restaurants or supper clubs may provide music and entertainment similar to that provided by a nightclub, the main difference being that food is the main attraction at these establishments, whereas entertainment is the main attraction at a nightclub. Comedy clubs are one type of venue which provides entertainment.

Another type of club is a concert club, which specializes in hosting performances of live music. In contrast to regular night clubs, concert clubs are usually only open when a performance is scheduled. Such live music venues can be popular, however, it is more common today to find a DJ (Disc Jockey) playing a continuous mix of recorded music using vinyl, CDs and MP3s.

The styles of music that are played at clubs differ all over the world. For example, in England and Toronto there are numerous drum'n'bass clubs (among many other types) owing to the popularity of the music in those areas. In continental Europe, tech-house, electroclash and techno are particularly popular. In Spain one might find not only House or Trance, but salsa and pop clubs. However, if one were to visit the island of Ibiza, they would find some of the most serious House and Trance clubs found in the world. Despite this, house music seems to enjoy universal popularity at dance clubs all over Europe. In the U.S., the largest and most intense nightclubs are those found in New York, Miami, Las Vegas, and Los Angeles. The music that fuels these non-stop parties can range from Hip-hop, Reggaeton, Salsa, Merengue, Bachata, Reggae, Hard House, Vocal Trance, or Hard Trance.

Source : http://en.wikipedia.org