Reformatt Travel Show provides the most detailed nightlife breakdown, covering 30 bars and clubs across Hongdae, Itaewon, and Gangnam in a single guide — including rooftop patios, speakeasies, cocktail lounges, and nightclubs. They name specific venues and also highlight the Hongdae Pub Crawl by Absolute as a fun option for visitors. Per Reformatt, Busan also has a notable nightlife scene, with 20 curated venues including rooftop bars and clubs like Vibrate. Creators collectively suggest Hongdae skews younger and more energetic, while Gangnam and Itaewon offer a wider range of atmospheres.