What a PC bang actually is
A PC bang (literally "PC room") is a gaming cafe with rows of high-spec computers, typically rented by the hour at a low hourly rate, historically central to Korea's competitive gaming and esports culture. Many are open 24 hours and serve food and drinks ordered directly from your seat, making it possible to spend hours there without leaving.
How to actually use one
Check-in typically requires ID (a passport works for foreign visitors) since accounts and time are tracked digitally, then you're assigned or choose a seat and pay for a block of time upfront or on exit. Most PC bang run pre-installed popular multiplayer games alongside standard web access, so it's usable for casual browsing too, not just gaming.
Why it's worth trying even casually
Korea's competitive gaming culture (particularly around specific esports titles) is a genuine source of national pride and mainstream popularity in a way that's still fairly unique globally — spending even an hour in a PC bang gives a real sense of that culture rather than just reading about it.