Lake Managua only in 2009 that a modern wastewater treatment plant (built and operated by the British company Biwater) was opened in Managua, but even it treats only 40% of the city's wastewater. The lake today has no stable outlet, with only occasional floods to Lake Nicaragua through the Tipitapa River. Pollutants are thus concentrated. Despite the pollution, some of the people of Managua still live along the lake's shores and eat the fish. In 2007 the "malecón" area was dredged and the sediment hauled off on barges. A strong odor which permeated the area from the sediment disappeared. A stone rip-rap
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