Best study cafes in Gangnam area

If you study in the Gangnam area like me, here are my favorite study cafes that I've tested over the past few months:

Toz Study Cafe (강남점) - Open 24/7, costs about 2,000 KRW/hour. Free drinks (coffee, tea, juice). Very quiet with individual desks and power outlets everywhere. Best for intense study sessions.

Hollys Coffee near Gangnam Station - Not a dedicated study cafe, but the 2nd floor is always quiet and spacious. Just buy one drink and you can stay for hours. Great WiFi too.

Danggeun Study Cafe - Newer place, very modern interior. 1,500 KRW/hour with free snacks and all-you-can-drink. Has both open seating and enclosed study rooms. My go-to for TOPIK prep.

General tip: most study cafes in Korea are open 24/7 and have better facilities than many libraries. They're especially great during exam season when university libraries are packed.