just check whether Inter continental hotel or any other franchise hotel has fee for early check in since this is the first reply on early check in fee for other program especially high tier loyal member:

I sent e mail to request for consideration on early check in and here are the reply from InterContinental Seoul COEX (Jan 7,2016)

Following are the reply for **, Reservations Manager from InterContinental Seoul COEX ,
I have noticed to reception desk for your expected arrival time at 08:00 in the morning; unfortunately, room is not guaranteed, depending on the availability upon check-in.

If room is available upon your arrival, we practice early check-in with extra charge:
06:00 - 09:00 - 50% of your first night's confirmed room rate
09:00 - 12:00 - 30% of your first night's confirmed room rate