The hotel ballroom was filled with pink balloons, the sound of love songs and 100 singles gathering for a night of wine, getting acquainted and — fingers crossed — romance. Before Mia Kim knew it, five hours had flown by at the mixer for 50 men and 50 women, held in a city just outside Seoul. A bar after-party then lasted until 1 a.m. But Ms. Kim, 37, who works at a software firm near Seoul, said the night still “felt too short.”Playing matchmaker was none other than the city government. The cities say the problem is that young people just do not want to get married — or have the babies that would follow in a country where only 2 percent of births are outside marriage.

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Persons: Mia Kim, Kim, “, ” Locations: Seoul, South Korea