Hyehwa [or 혜화 in Korean] is located in the north eastern part of central Seoul and has its own subway station (see map here). My hostel was located nearby, withing 10 min of walk. I went here every night and had something to eat. The food is really delicious here, but the prices may not be low. The people here mostly young, you can see many neatly dressed guys and some very hot girls. Maybe Hyehwa can be a place, where you would bring your girl on a first date? Who knows. It's definitely a very neat, clean and fun part of Seoul and there's something going on every day, be it theaters, pubs or restaurants. Open all the time. Enjoy some photos.
Let me introduce you Seoul's district for young people at heart
The wide road leading to Hyehwa. Another view. A pedestrian street with many shops and restaurants. This hilarious bench can be seen in Hyehwa. Koreans like to eat hawker food under the tents in Hyehwa. It was cold that night. Many hawkers like this are located here as well. I've tried this yummy food here. It was cheap. It's made of rice and a little spicy. I also went to Hyehwa to try some Korean barbecue. More about it later.