Question! Which area is best for beauty in Seoul, and which accommodations are convenient?

Hello everyone! My name is Champ, and I'm from Thailand. I'm planning a trip to Seoul next month and am interested in exploring some beauty treatments. This will be my first time! 😅

I'd love some advice from those who have been before: which areas are best for checking out beauty clinics? I've heard Gangnam and Apgujeong are popular, but I'm not sure how they differ or which area offers the widest variety of choices.

Also, any accommodation recommendations? I'd like to stay close to the beauty clinic areas for convenience, with a nice atmosphere and reasonable prices. What's the typical nightly rate? If anyone has experience with this, please share your recommendations. Thank you!