Hotel packages have even been released to coincide with the BTS Gwanghwamun concert.

Seoul luxury hotels a week ahead of the Gwanghwamun performance
They are churning out The City Seoul linked packages.

JW Marriott provides limited edition gift sets in themed rooms
Westin Seoul Parnas is limited to 100 worldwide.
They released a package containing four limited items.
From Hanwoo Yukjeon to the Chiljeolpan menu inspired by the number 7 in BTS.
A variety of food and beverage promotions have also been prepared.

It's a place where you can enjoy accommodation, merchandise, and gourmet dining all at once.
If you are interested, you should hurry.