I thought Colombo was an EK lounge? May have been imagining it.
RUH - tiny and very cramped lounge, indifferent food, not bad selection of drinks.
JED - fairly large lounge with two floors, awful food options, gets very busy. Free wifi.
DMM - large lounge but not much seating - never seen it really busy though. Good selection of snacks but nothing more substantial. By far the most peaceful of the three. Free wifi, when it works.
ICN - KAL Concourse Lounge. Very stylish, fair but not spectacular food options. Plenty of seating and a few quiet areas. Not as great as you'd expect from a KE lounge in their home base, but comfortable.