Picabu is a sort of hybrid location operating as both a convenience store and a fast casual location.
My previous experience with the
AAA discount at Picabu is that the discount only applied to the "food/beverage" items, and did not apply to the "convenience store" items. So items like packaged snacks and bottled beverages were not discounted, but "fresh prepared" food items (like the plastic clamshell salads or sandwiches) usually were. I haven't stayed since January 2020, though, and don't remember exactly what fell into which category.