Nightlife Party Girls

Nightclub hours vary widely across the world; in areas with strict liquor regulations in place, nightclubs may have a legal requirement to close at a certain hour. These cities sometimes have illegal "after hours" clubs that stay open and serve alcohol after this legal closing time. In non-regulated areas, nightclubs stay open all night and into early daylight hours.
Entertainment is the main attraction at some types of nightclubs. One 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. Other types of clubs include "all-ages" clubs, which allow non-drinking age attendees.
Nightclubs can be built in former warehouses and cinemas, deconsecrated churches, underground buildings, and custom-built buildings, and generally have thick insulated walls and few or no windows, so that the neighboring buildings will not be disturbed by the powerful beat of the dance music, the flashing lights and crowd noise generated throughout the night. This style of construction also keeps light and noise from the street from entering the club. This allows the nightclub to turn the dance floor into an alternate, illusory realm of timelessness. Even if an all-night rave at a nightclub lasts until 6 a.m., when it is light outside, to the clubgoers, it is still dark inside the club, and the partying and dancing continue.