NORWALK - Police say a Norwalk couple has been charged with leaving their three young children alone overnight while they went clubbing in New York City.Investigators say 27-year-old Crisly Avila and Hilario Avila-Berges, 34, partied in the city while their boys, ages 9, 5 and 4, were left unattended in the family's apartment.Police say they received an anonymous tip about the situation. They say the children are staying with grandparents while the couple remains in jail.