Is it dangerous to drive a few hours after having a glass of Makgeolli???

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Here is my concern:
An acquaintance suggested going hiking in a few days and said, "Let's have a glass of Makgeolli at the top of the mountain."
The thing is, I'll be the one driving.
My acquaintance says that just one glass will wear off completely by the time we hike back down,
but I'm feeling a bit anxious about it.