Couple things to notice reading the passage:

1. People propose a “ban” but use "restrictions" in their example. Do the terms mean the same thing?
2. Even with restrictions bar’s revenues increased!

The only question in my mind by now is does “restrictions”=”full restrictions” i.e. ban?

Because if restrictions are “full” (i.e. no alcohol is sold) but revenues increased than Bar Owners have nothing to worry about should ok the ban and expect revenue growth. However, if restrictions are *partial* (say only 2 hours/day alcohol sale is permitted) then the evidence People use to support their claim (2 hrs/day alcohol sales but revenues show increase) will definitely show that alcohol sales make $$$ and by implementing the ban this dollar stream will be gone!

Now, D tells us that alcohol was sold couple hours per day i.e. the restrictions do not equal to ban!