Korea may look like a cafe lover's paradise, with coffee shops seemingly around every corner. But celebrities who have actually tried running one have a surprisingly sobering message for aspiring owners: Think twice. Singer and rapper Hanhae recently shared his own costly experience in the cafe business, while K-pop icon Lee Hyo-ri revealed that even the wildly popular Jeju cafe run by her husband, musician Lee Sang-soon, did not make as much money as its long lines might have suggested. The two discussed the realities of running a cafe on the Monday episode of JTBC's relationship reality show "Love War," after a woman featured on the program said she dreamed of opening one. Hanhae immediately tried to talk her out of it. "I've actually failed at running a cafe before, so this doesn't feel like someone else's problem," he said. Hanhae said he opened a small cafe in Seoul's Sangam-dong several years ago, selling yogurt and coffee. But competing on price proved difficult when a major franchise nearby was selling coffee for as little as 900 won ($0.64) per cup. He said the reality was a far c