The bingo card asks you to pick a side: McDonald’s fries or pineapple pizza? The answer, apparently, says something about who you are. It’s the kind of playful, low-stakes self-interrogation that K-pop group Cortis have built their brand around – and inside a neon-drenched hideout in the heart of Seoul, 30 fans got to work it out alongside the group themselves. The space is split between two worlds. The Red side hits you first – deep crimson walls pulsing under neon light, electric and visceral. Cross into the Green, and the temperature drops: teal-washed surfaces, an arched wall layered with photos and mementos, neon accents that feel more intimate, more personal. It’s the visual language of “Redred,” the lead single off Cortis’ second EP “Greengreen,” made physical and walkable. On April 28, Airbnb threw open the doors of the Airbnb & Cortis Seoul Hideout for an exclusive two-hour experience.…