In 2015, Koh worked with actress-director Michelle Chong, former radio deejay Daniel Ong, and three other partners to open a 180-seater restaurant, Mischief, at Esplanade.
In 2015, Koh joined forces with actress-director Michelle Chong, former radio DJ Daniel Ong, and three other individuals to open a 180-person restaurant named Mischief in Esplanade.