Walk into a cafe in Seoul and you may be handed a plastic buzzer instead of a table number. Your coffee might come in a mug when you expected a paper cup, and there may be a shelf where you’re expected to leave your tray afterward. Of the Korean cafe rules in this guide, most are set by the shop or are simply habits, not law.
The legal rule a visitor is most likely to notice is about cups. If you order to drink in the shop, the cafe may not give you a single-use plastic cup.[1][2] Most of the rest, from the buzzer to the one-drink-per-person sign, is a shop rule or a habit, and it can change from one cafe to the next. This guide sorts them into the three groups.
We read the environment ministry’s press releases, a Seoul district office’s rules page and Korean news reports on October 26, 2026 (how we research).
Law, shop rule or habit
| What you notice | Which kind | Why |
|---|---|---|
| You won’t get a single-use plastic cup if you stay | Law | Coffee shops and fast-food shops may not use single-use plastic cups for customers in the shop. Takeout is exempt.[2] |
| A paper cup is allowed even if you stay | Law (an exemption) | Paper cups were taken off the restricted list in November 2023.[3] |
| Straws are given only if you ask | Shop rule | Shops that signed a July 2026 agreement with the ministry hand out straws only on request.[4] |
| A sign asks each person to order a drink | Shop rule | Set by the cafe. It differs from place to place.[8] |
| No printers, desktop computers or partitions | Shop rule | Starbucks Korea told its stores to stop customers using them in August 2025.[7] |
| You get a buzzer and collect your order | Habit | A 2016 report described buzzers as a common sight in cafes, food courts and fast-food restaurants.[9] |
| You carry your tray back | Habit | Our reading: it goes with self-service. A 2016 report said small business owners were moving to self-service to cut staff costs.[9] |
A shop rule isn’t law, but it is the shop’s call. If a sign asks for something, the polite thing is to follow it.
The cup rule is a law
Korea’s resource recycling law limits single-use (disposable) products in some businesses. For coffee shops and fast-food restaurants, the rule covers single-use cups made of plastic or metal foil, along with single-use plates, containers and cutlery. The exception is takeout, including a takeout cup you decide to drink from in the shop.[2] The ban on plastic cups inside cafes was relaxed during the COVID-19 pandemic and brought back on April 1, 2022.[1]
That’s one reason the cashier may ask whether you’re staying or taking your order out. The rule falls on the shop, not on you.[2]
Paper cups are a different story. The ministry planned to ban them inside cafes from November 2022, then gave shops a grace period. In November 2023 it dropped paper cups from the ban altogether. Among its reasons, the ministry cited the cost to shops of hiring staff or installing dishwashing equipment to serve every drink in a reusable cup, and the lack of space in small shops.[3]
That may change again. In December 2025 the ministry proposed showing the price of a single-use cup separately on receipts.[5] In August 2026 Yonhap News Agency reported that the ministry planned to ban paper cups inside cafes again, starting with larger shops, and would set the schedule with the industry within the year.[6] Check the cup rules again before you travel.
Why the buzzer, and why you clear your own tray
Neither is a rule. A 2016 report in the Kyunghyang Shinmun described the buzzer as a common sight in cafes, food courts and fast-food restaurants. It said small business owners were moving to a self-service model to save on staff costs, with customers placing orders and carrying their own food, and adding buzzers or number screens to make it work.[9]
In our reading, the cup rule is part of the link. A mug or glass has to be washed,[3] so a cafe that serves drinks in reusable cups and has no table service needs customers to bring them back.
Not every cafe uses a buzzer. Some call out your order number or name, show it on a screen, or send an alert through their own app.[9][10]
Here’s the order in a typical self-service cafe:
- Order and pay at the counter or a kiosk. Tell the staff whether you’re staying or taking your drink out.[2]
- Take the buzzer, find a seat, and wait.[9]
- When the buzzer goes off, collect your order at the counter and give the buzzer back.
- When you’re done, take your tray, mug and plate to the return counter or shelf, if the cafe has one.
If you see a counter or shelf marked 반납 (bannap, “return”), that’s where your tray goes.
Staying for hours, and one drink each
Korean news reports have a word for people who study in cafes: kagongjok, or “cafe studiers.”[7] Shops set their own limits on long stays, and those limits are shop rules, not law.
In August 2025 Starbucks Korea told its stores that customers could no longer use personal desktop computers, printers, power strips or partitions. Yonhap said the move appeared to follow complaints about people using its stores as private offices. The company also asked customers to take their belongings with them if they leave their seat for a long time.[7]
Some cafes ask each customer to order at least one drink. In July 2026 a post about a group of four adults and a toddler asked to order one more coffee after spending about KRW 67,000 (about US$50) on food and drinks set off a debate online. According to the report, cafes use the rule because groups sometimes order very little and stay a long time.[8] If a cafe posts the rule, follow it.
Good to know
Before your first cafe visit:
- Decide whether you’re staying or taking your drink out before you order.[2]
- Keep the buzzer with you and return it when you collect your order.[9]
- Ask for a straw if you need one. Some shops don’t put them out.[4]
- Look for a return counter before you leave.
Cup rules can change. Check the environment ministry’s press releases (in Korean) before you go.
For another table habit that puzzles visitors, read why there’s toilet paper on Korean restaurant tables. If you take your cup out, our guide to Seoul’s street trash cans explains where to put it when you’re done. More is in Everyday Seoul. To see how we’re paid, read how we’re funded.
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