It had already passed midnight but the night was still young for an energetic art crowd gathering on the rooftop of a rundown low-rise building in the South Korean capital’s hip neighborhood, Itaewon.

SEOUL — At exactly 7 a.m., sunlight poured into a glass-walled cafe in central Seoul, splashing over a crowd ready to party. The bass thumped, not in the haze of a nightclub, but in the clean, crisp ...

South Korean authorities said Tuesday they were using mobile phone data to trace Seoul nightclub visitors as they try to tackle a coronavirus cluster, promising anonymity to those being tested due to ...