If he's in a 사워, 사 우 어 mood, some type of whiskey. 쓴, 쓰라린 and strong. Can be mixed with other drinks 또는 just poured over the rocks.
If he's in a flirty, happy mood, I think he's like some 더 많이 "fruity" drinks. Just enough alcohol to get buzzed, but not enough to really taste 또는 get drunk off of.
And the rest, I think he'd enjoy a nice, hot, strong (and heavily sugared) coffee XD