What are the interesting places in Jeju Island at night, such as bars, nightclubs and KTV?

Last time we went to Jeju Island, we went to the Lonely Club on Healthy Road. As long as you have time, you can experience these nightlife in this house. Actually, it's near Silla Duty Free Shop, and it's easy to find. We contacted their Chinese-speaking Xiao Liu and found it online. Later, he personally drove to the hotel to pick us up, but it is worth reminding that if you go to Jeju Island to play nightlife, it is better to book a hotel in the north of Jeju, which is more convenient. There is really nothing interesting in the south. We just made this mistake. Fortunately, the last night's hotel was booked at Karl Hotel in the north, because the last day of returning to China was close to the airport. Otherwise, we won't experience such a pure and passionate Korean nightlife.