So, you have a band, but you don’t have a drum set, amps, pa system, etc. Or, maybe you do, but you’re afraid that your neighbors wouldn’t put up with the noise. At any rate, have no fear. There are plenty of rehearsal studios in Korea. These studios run about 10,000-20,0000W per hour, depending on the size of the room, the quality of equipment, and location. If you’re in a band, the per-person rate ends up being very reasonable.
We recommend this blog, which provides a comprehensive list of rehearsal spaces (especially in Seoul) along with honest reviews of them and, often, photos of the equipment.