Recommend good spots for nightlife in Seoul?

Hongdae is a meme but it's still nice because there's a shitton of clubs, it's almost always free entry, you can go out and reenter later with no issue, etc.... but the vibe is just off, the Korean dudes there are the horniest motherfuckers around and now there's always a bunch of Filipino whores walking around everywhere waiting to be picked up.

Gangnam is just stuck-up plastic surgery type people so the vibe is also weird.

It's fun to go to Jongro but the average age of people drinking there is about 70, so not the best for hanging out with people my age.

I like Sinchon and Seongsu but it's more for a dinner+drinks with friends rather than some proper partying.

Any other recommendations?