found: Work cat.: Nuits d'Europe : pour des villes accessibles et hospititalières, 2007.
found: San Francisco late night, c1987.
found: Japan at night : a guide to entertainment & leisure in Japan, c1987.
found: Travel Scotland website, Feb. 13, 2008(category: Night time activities)
found: Bermuda Travel website, Feb. 13, 2008(Vacations--Nighttime activities)
found: Encarta world English dict.(nightlife: the entertainment or social life that goes on in a place in the evenings)
found: Web. 3(night life: the activity of pleasure-seekers at night (as in nightclubs)