I should have mentioned that in the dwelling unit wet bar scenario above, if the area doesn't qualify as a kitchen and you have a refrigerator, cooler or kegerator, the branch circuits supplying these would also be required to have AFCI protection.
I believe that based on the definition of an outlet in Art. 100, this requirement could also apply to 120V branch circuits supplying a glass washer or compact dishwasher in this area as well.
