A lightstick only works properly once you've registered your seat (pairing)
Official lightsticks now change color during shows via central control. For this, you need to connect the lightstick to the official app over Bluetooth and enter your seat information. Depending on the model, your phone's location (GPS) may need to be on to connect, and you often have to switch the lightstick to "concert mode" for the show. If registration is tricky, look for the pairing booth set up at the venue; your registered seat must match the seat you actually sit in for the effects to work properly. Bring spare batteries too.
Keep your original passport on you the whole time
Foreigners may be asked to verify their identity not only when collecting tickets but also at entry, and the accepted ID is usually a physical passport. Copies or phone photos may be refused, so bring the original — and keep it in a neck pouch or similar so you don't lose it in the crowds. If the booker's name doesn't match the name on the passport, you may be denied entry.
Check merch pre-sales and online sales first
Official merch (MD) is sold in several ways, such as online pre-sales before the show and on-site sales, and on-site lines often stretch for hours before the show starts. If there is a pre-sale with on-site pickup, it can greatly cut your waiting time. Sales methods, payment options and per-person purchase limits vary by show, so check the agency's announcements.
Etiquette for receiving nanum (free fan-made merch)
Around venues there is a 'nanum' (sharing) culture where fans hand out photocards, stickers and other items they made themselves for free. The location and how to receive them (such as saying a password) are usually announced in advance on social media, so follow the instructions and don't take more than one per person. Don't block walkways or leave trash behind, and follow the venue if it restricts sharing in certain areas.
Practice the fan chants and singalongs beforehand to double the fun
At K-pop shows, each song has a set fan chant (calling out member names in order, singing along to certain parts), and the whole crowd singing together is a big part of the concert. Learn the lyrics and chants in advance from fan chant videos shared by official channels or the fandom. Even if your Korean is shaky, knowing just the member-name chant lets you blend right in.
Check the show's notice before filming
Whether filming is allowed differs by show, and many shows announce beforehand that photos and videos are banned. If you're caught filming where it's prohibited, you may be stopped or removed, so follow the notice. Even when filming is allowed, basic etiquette is not to hold your phone up high and block the view of people behind you.
Prepare for weather, food and bags assuming you'll wait outdoors
Even at indoor shows, merch lines and entry waits often mean long hours outdoors. Bring water, a hat and a handheld fan in summer, heat packs and a warm coat in winter, and a raincoat for stadium shows. Items allowed into the venue (food, large bags, selfie sticks, etc.) vary by show, so check the notice, and subway station lockers fill up fast on show days, so pack light.
Check last train times in advance
Seoul's last subway trains vary by line and direction but generally run until around midnight. If the encore runs long, the show ends later than planned, so check the last train to your accommodation in a map app beforehand and look up night bus routes too. The station closest to the venue gets very crowded right after the show, so walking to the next station is an option, and at places with little public transit, like Yeongjong Island (INSPIRE Arena), the last shuttle time is especially important.
Don't rush when leaving—follow the flow of the crowd
At venues holding 10,000+ people, crowds rush the exits and stations as soon as the show ends. If you're not in a hurry, wait a bit before leaving, and follow the routes directed by on-site safety staff. Agree on a meeting spot outside the venue in case you get separated from your group.
