Seoul often reveals two faces—one in daylight and another under neon—and the latter comes alive most vividly in Gangnam. After office workers file out of the glass towers, foot traffic actually thickens rather than thins. Visitors quickly see why: the district’s...

Street-level neon along Gangnam-daero flashes cartoon microphones every evening, tempting passers-by with the promise of private pop-star moments. Seoul hosts an estimated 30,000 karaoke 강남 풀싸롱 rooms, yet the district south of the Han still tops locals’ Friday-night...