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 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.