Managua waste water to a new water treatment plant at Las Mercedes in Eastern Managua in May 2009 relieved old concerns over water pollution and native wildlife, and brought some residents closer to the old city center and the rest of the mainland. Managua is located on the southern shores of Lake Xolotlán, also known as Lake Managua. Lake Xolotlán contains the same fish species as larger Lake Cocibolca in southeastern Nicaragua, except for the freshwater sharks found exclusively in the latter. Once a Managuan scenic highlight, the lake has been polluted from the dumping of chemical and waste water since
Managua Foreign embassies in Managua also sponsor film festivals. Since the late 1990s and early 2000, many casinos and karaoke bars opened and have remained popular attractions for Nicaraguans and foreign visitors. Popular music includes the Palo de Mayo, Merengue, Cumbia and Latin pop among other Latin music genres, as well as American pop and rock. Salsa dancing is a national pastime. Managua boasts a vibrant night life. Nightclubs and bars are abound in Managua, particularly, in the popular areas called "Zona Viva" located in the shopping mall "Galerías Santo Domingo", as well as very close by "Plaza Mi Viejo Santo