Annie isn't really drinking. She wants to remain clear headed enough that the crowds (and the vampires) don't bother her. Finnick assured her that there was to be no violence at the festival, and so Annie had gone with him, dressing her best for the autumnal festival. She knew what it meant- Finnick's court was falling out of power, but it was a fae celebration all the same. It was important she be there for him.

It's the loud Southern Booyah! that gets her to turn and look and actually see a tipsy looking Daryl. "Daryl!" She cries, bouncing over towards him. "I didn't expect you to be here. Uhm- is booyah still a thing in US? When you drink?" She preferred a quiet cheers.