Gilpost · Mapo-gu, Seogyo-dong
Cafe
Millenieol 364
밀레니얼364 The name is the English word 'millennial' followed by the number 364; no post explains the number.
Compiled from 8 blog posts read in fullSources →
A large cafe on the second floor of the Kozayo hostel building on Wausan-ro 21-gil in Hongdae. It doubles as the hostel's front desk, and guests eat breakfast in the same room. People come for coffee, ades, lattes and a Basque cheesecake — all four posts that ordered dessert chose it. Only one post listed prices: 7,300 won for a peach-muscat ade and 6,800 won for a lemonade (October 2024). We read 12 posts from October 2024 to August 2026; 8 describe a visit.
Data as of · Published ·
Location & hours
- Address서울특별시 마포구 와우산로21길 21, 2층 (서교동)21 Wausan-ro 21-gil, Mapo-gu, Seoul
- Phone0507-1318-3433
- Typical spend₩6,800 – ₩7,300
- From the station1 posts say it is walkable from the station.
- Floor areaFloor area 217 m² · Status In business
When it opens
Of 4 posts: 3 wrote Daily 11:00–21:00.
| Daily | 11:00–21:00 | 3 of 4 posts |
|---|
Counted from what bloggers wrote in their posts; we did not confirm it with the restaurant. Where the values differ, it may be a change over time rather than a disagreement, so we show when each one was written.
What sets it apart
- Four posts called the room large, with window-side sofas, a bar table, cosier wall seats and group tables. Three said the chairs were comfortable — one writer, heavily pregnant, was glad every seat had a sofa-like back.
- Three posts called it quiet — one worked there undisturbed on a Monday afternoon, another mentioned soft old pop songs. Two noted the windows and daylight.
- Two posts said the Basque cheesecake slice was large — one called it the biggest single slice they had had.
- With a hostel upstairs, two posts noticed many foreign guests. One said the owner speaks English and that there is also a kiosk beside the counter for ordering and paying.
What 8 bloggers said
baseukeu chijeukeikeu
Roomy
We read all 8 in full. The most common claims are “Roomy” (4) and “Quiet” (3).
What they liked
Things you can check on site
- Second floor 6 of 8 posts
- In a basement saying it is not 6 of 8 posts
- Foreign customers in the room 2 of 8 posts
- Large windows 2 of 8 posts
- Lift to the floor saying it is not 2 of 8 posts
- Phone charging 2 of 8 posts
- Self-order screen 1 of 8 posts
- Reachable by transit 1 of 8 posts
These are raw counts, not percentages. Someone who did not mention something is not someone who disagreed.
Who came, and with whom
- With a friend 2 of 8 posts
Where it is
We could not find this shop’s own listing on Naver Map, so the link searches for its Korean name around this spot instead.
From the station
1 posts say it is walkable from the station.
Getting inside
| Second floor | 6 of 8 posts |
|---|---|
| In a basement | yes 0 · no 6 (of 8 posts read) |
| Lift to the floor | yes 0 · no 2 (of 8 posts read) |
The building has a lift, but you walk up to the cafe. Two posts said so: one that the lift is for hostel guests only, the other that it does not stop at the second floor. One noted the stairs were slippery in the rain.
We don't know about wheelchair or stroller access; nobody wrote about it, though two posts said the cafe is reached by stairs.
No post said where the toilet is or whether it is separated by gender.
No one mentioned: Ramp at the door · Step at the entrance · Step-free access · Toilet inside · Accessible toilet · Separate restrooms. That is not the same as there being none — it means we could not confirm it. Worth calling ahead, and do tell us: we will put it here.
How to read these posts
- Someone else paid1 of 8 posts
- Posts saying nothing either way7 of 8 posts
Posts that followed a TV spot
Of the 10 posts we gathered, 2 went up on a single day right after a TV spot and show no sign of a visit. They retell the broadcast, so we left them out of the counts.
We do not discard them. That a TV spot produced a burst of posts is itself something worth knowing about a place, and a star rating will not show it.
When the posts appeared
Month by month
| Month | Posts |
|---|---|
| 2024-10 | 5 |
| 2025-01 | 1 |
| 2025-11 | 2 |
What we do not know
- Only one post walked it and timed it: about 7-8 minutes from Hongik Univ. Station exit 9. Other distances were copied from listing blocks, so we didn't count them.
- No post mentioned waiting. That doesn't mean there is never a wait — just that nobody wrote about one. One found it quiet in the evening, another on a Monday afternoon.
- Only two posts said who they came with — both with friends. Nobody wrote about going alone, with family, or on a date.
- Four posts list 11:00-21:00 daily, and one says there is no regular day off, but all copied it from a listing block; nobody confirmed the hours in person.
- Only one October 2024 post gave prices (ades at 6,800 and 7,300 won). Nobody gave prices for the cheesecake or coffee, or what a visit costs in total.
- Four posts give the same phone number, 0507-1318-3433. Nobody said whether the cafe takes bookings.
- Five of the eight visit posts appeared within one week (10-17 October 2024), two of them ending with an identical set of five hashtags, and one disclosed a free visit. Some may be promotional, so weigh the praise from that week accordingly.
- Decaf is unclear: one post said decaf is available, another said the drink they wanted had no decaf option.
Sources (8)
Every number above was counted from the posts below.
- 103호 방탈출+이것저것 2025-11-09 · 만두박람회 · via Daum
- kozayo 호스텔 2층 카페 - 밀레니얼364 2025-11-03 · 토깡이의 행여공(행복한여행공유-맛집,카페,국내등)
- 코자요 사이드 싱글 숙박기 / 서울 마포구 서교동 홍대입구역 망원.... 2025-01-15 · 판단을 타인에게 미루지 말자
- [서울/ 홍대입구역 ] 밀레니얼 364 :: 고급진 음료가 매력적인 홍대입구역 카페 2024-10-17 · ǫᴜᴇ sᴇʀᴀ sᴇʀᴀ · via Daum
- 합정역 카페 커피와 디저트가 맛있는 밀레니얼 364 2024-10-16 · 밀양박씨의 서울살이 · via Daum
- 홍대입구역 대형카페 밀레니얼364 바스크치즈케이크 후기 2024-10-16 · 도부부의 일상 · via Daum
- 홍대입구역카페 크고 편한 홍대대형카페 밀레니얼364 2024-10-15 · ★토니의사소한일상
- 홍대입구역 밀레니얼364 | 케이크 맛있는 홍대 대형 카페 2024-10-10 · 봉구덕구 다이어리
We opened all 301 candidate posts and kept 8 as evidence.