I want to go to a grand nightclub when traveling in Korea. But what should I wear to a nightclub? Where can I buy nightclub clothes?

I have been to a grand nightclub. The Korean girls in the nightclub are all beautifully dressed. I go to Dongdaemun DOOTA to go to nightclubs. The clothes there are all beautiful. There is a store specializing in nightclub clothes. There are gorgeous jewelry shoes and more. You can hang out there until late and then go straight to the huge nightclub. The subway there is very convenient. Dongdaemun has Chinese translation. If you have any questions, you can ask the clerk.