When one considers the absolutely necessary essentials for any city, a LEGO store is obviously near the top of the list, ranking just below a hospital and maybe a grocer. So with that in mind I built this today, using only pieces from 4996 Beach House (apologies for the poor photography):
The red tile is obviously just a placeholder until I can get one of these beauties. Also note the display sets in the windows, microscale renditions of Lighthouse Island and a Ninjago castle.
A look inside - roof hinges open from the front for access.
Here we can see the shelves, two-tiered display table, and Pick-A-Brick bins. The stock is a little sparse at the moment; maybe they're still waiting on a delivery?
The opposite corner, showing checkout counter and doorway to the back. Isn't that nice, the employees have an open-air stock/break room... or maybe the contractor just skimped on the budget because he didn't have enough bricks to enclose the space.