Do hotels near Korean concert venues get more expensive on concert days?

Yes, noticeably. Hotels right by a big venue raise their rates for the show weekend and the cheap rooms sell out first, sometimes months ahead for a stadium run. The fix is to book as soon as you have tickets, and to look a few subway stops out on the line you ride home, where prices stay closer to normal. Our per-concert guides show the venue-adjacent surge against the cheaper nearby areas so you can see the gap before you book.