I think your right about aesthetics. If you look forward in the live picture just beyond the yellow wall towards the water, and to the right of the small building, you will see yet another larger industrial exhaust fan sitting to the left of the two A/C units. Notice the cone like dome on top. Not a place I would particularly want to be sitting with both exhaust fans are running at the same time. They must have added something in the kitchen, just guessing.