Seoul's night energy concentrates between Itaewon and Hongdae. Subway stops 12:30am but night buses connect these districts until 5:30am when trains restart.

Start Itaewon for international club scene then bus to Hongdae for Korean uni crowd energy. 24-hour galbitang places in Mapo-gu feed the party circuit. Jjimjilbangs like Dragon Hill Spa become crash pads.

N16 night bus runs Itaewon-Hongdae every 20 minutes. Much cheaper than 30,000 won taxi surge pricing during peak nightlife hours.