Stemp Coffee COEX is a large cafe selling coffee and desserts near the Megabox entrance at COEX Mall in Samseong-dong. It has signature coffee, lattes, fruit cocktail drinks, an butter scone, and Earl Grey crunch, with an interior that brings to mind plants and a flower shop. A movie ticket gets you a size upgrade or a discount, and each seat has a different feel. One staff member takes orders at a single counter, so the wait is long.