Jazz bar in Gangnam: front-row seats for Yun Haecheol Trio, Flat Nine

What is Flat Nine, the jazz bar near Gangnam Station?

Flat Nine is a jazz and dining space between Gangnam and Sinnonhyeon stations where you can enjoy a course meal and a live jazz show in the same spot. I was looking for a good bar around Gangnam Station and wanted a slightly special evening, so I paid Flat Nine a visit.

It's not just a place to eat. It's a jazz and dining space with tasty course dishes and live jazz together, so this time I booked through Naver for Saturday at 4pm and had the dinner course for two. Having a meal and a show at once really did make it special.

The Yun Haecheol Trio was scheduled that day, a jazz trio of guitar, organ and drums. From a two-seater table facing the stage, I could enjoy the atmosphere from the moment the food arrived until the show ended. Let me walk you through it :)

How to get to Flat Nine and where to park

Flat Nine is at 10 Gangnam-daero 65-gil, 5th floor, Seocho-gu, Seoul. It's within walking distance of Gangnam Station Exit 10 and Sinnonhyeon Station Exit 7, so it was easy to reach by public transport.

Come in from the Giordano alley side of Gangnam Station and look for the building. The ground-floor entrance shows the day's lineup and the menu, so it wasn't hard to find even on a first visit. Take the elevator to the 5th floor and the jazz dining space is right there. Being able to check the day's lineup from the entrance, and so know which musicians you'll see, is a fun touch.

As for parking, the building itself makes it difficult, so the subway is more convenient than driving.

Flat Nine interior, seating and the front-row two-seat table

The first things I noticed on walking in were the softly glowing lights and the stage in the dark room. The space is done mainly in black and deep colors, with warm lighting on every table, so it felt calm yet upscale.

There's a bar area on one side, and two-seater tables and tables for larger groups on the other, so it looked good for everything from dates to gatherings.

Many tables face the stage, so the layout suits watching a show while you eat. I sat at a two-seater facing the stage head-on, and I personally loved it. The small lamp on the table, the plated food and the live show right in front of me all came together like a single frame, which made it great for photos too.

Black-and-white photos hang on the walls, and guitars, amps and drums sit around the stage, so if you love music, just looking around the space is fun. The atmosphere lets you focus on the performance naturally while you eat, which made it a very different experience from an ordinary restaurant.

Flat Nine Dinner Classic Course for two: price and courses

What I ordered was the Flat Nine Dinner Classic Course for two. At ₩39,000 per person, it runs from an aperitif through an amuse-bouche, bread, a seasonal salad, pasta, steak and dessert, which made it a pretty hearty meal.

Aperitif: Opening Note, switched to non-alcoholic

The aperitif, Opening Note, is a drink with the fresh berry notes of cranberry and raspberry, plus mint, lemon and sparkling.

I had it swapped to the non-alcoholic version. The first sip was fresh and bright, and toward the end I felt the refreshing mint and lemon. It wasn't just sweet; it had a nice acidity that gently woke up my appetite before the main course began.

Amuse-bouche: Crispy Dauphinoise

The amuse-bouche, Crispy Dauphinoise, is made of thinly sliced potatoes stacked in layers and deep-fried until crisp.

The outside was crunchy like a snack, while the inside kept the fluffy texture of potato. Lemon butter, smooth and nutty, plus the aroma of shiso and chervil made it feel much lighter than a simple potato dish. A nice bite-sized amuse-bouche.

Bread: focaccia with extra virgin olive oil

The warm focaccia was slightly crisp outside and soft and moist inside.

Eaten with extra virgin olive oil and balsamic glaze, it gained a subtle acidity and nutty richness, tasting different from the bread on its own.

The bread was warm, as if fresh out of the oven, so it was a lovely way to start before the courses.

Seasonal salad: swordtip squid and Korean melon carpaccio

The seasonal salad, a hanchi (small squid) and chamoe (Korean melon) carpaccio, was an especially memorable dish in this Flat Nine course.

Smoked squid, melon and pickled radish are sliced very thin and topped with a charred paprika sauce. The chewy squid and the crunchy, subtly sweet melon went together in a fun way. The pickled radish added a tangy accent, so the whole thing felt light and clean. I especially remembered the pairing of faintly smoky squid with sweet melon, which worked better than I expected.

Pasta: basil tomato mille-feuille lasagna

The pasta was a mille-feuille-style basil tomato lasagna, with fresh pasta layered with ragù, béchamel and cheese, then baked twice, in a pan and in the oven.

The layers were more distinct than in an ordinary lasagna, and it was fun how the fresh pasta and sauce separated neatly when cut with a fork. I tasted the acidity of tomato, the deep savoriness of the ragù and the softness of the béchamel, and the cheese added plenty of richness. The basil kept the overall flavor from getting heavy and finished it on a fragrant note.

Steak: herb-crusted Jeju black pork tenderloin

The main, Jeju black pork tenderloin, is grilled over binchotan (white charcoal) and finished with an herb crust. There was a faint charcoal aroma on the surface and the inside was tender, so I could enjoy the clean, mild taste typical of pork tenderloin.

The mango purée served alongside was sweet and smooth and made a different kind of pairing with the meat, while the baby potatoes and mushrooms worked as sides supporting the mild main. The herb and charcoal aromas blended, and the steak's own flavor was quite distinct.

Dessert: cream cheese chocolate cake

The final dessert was a chocolate cake with house-made cream cheese and nuts.

It had a rich chocolate flavor, yet the cream cheese kept it from feeling heavy, and the nuts added a crunchy texture here and there. Deep chocolate, soft cream cheese and nutty crunch together made a sweet ending to the meal.

How does the Yun Haecheol Trio live jazz show at Flat Nine work?

Flat Nine's live show runs in two sets of 40–50 minutes, and that day's stage belonged to the Yun Haecheol Trio, made up of guitar, organ and drums. The show was the part I was looking forward to as much as the food on this visit.

Eating at a two-seater table facing the stage while listening to the playing was clearly different from a regular restaurant playing music. The guitar melody, the full sound unique to the organ and the drum rhythm flowed into one another and kept changing the mood.

I enjoyed the flow of getting absorbed in the show, taking a short break to eat when the food came, then sinking back into the music. I really enjoyed the Yun Haecheol Trio too, and felt very satisfied that day to have had a meal and music together.

The show schedule at Flat Nine changes by date, so it would be even better to check the lineup before visiting and book a day when the musicians you want are playing. The live show runs in two sets of 40–50 minutes with an intermission between, so you can enjoy the meal and the performance at a relaxed pace.

Is Flat Nine a good Gangnam date bar? Final verdict

If you're looking for a good bar near Gangnam Station and want a time with more atmosphere than an ordinary meal, Flat Nine seems like a pretty different choice. Being able to enjoy course dishes and live jazz in one place made the meal itself feel like a small show.

What stayed with me most was that it's a dining spot where you enjoy the music and the space along with the food, not somewhere you just eat and leave. If you're planning a date around Sinnonhyeon, picking a day with a live show is a good idea. If you want a place between Gangnam and Sinnonhyeon stations for food, drinks and a show all at once, Flat Nine!