“Casa Grande zoning, in any case, has proved something of a magnet for dispensary applicants. . . . ‘In Casa Grande, a special use permit isn’t needed for a dispensary. Instead, the city created a special medical marijuana zoning overlay near Casa Grande Regional Medical Center on East Florence Boulevard.’  Of the dozen applicants for a dispensary in the overlay district, seven are for a single address in a medical plaza. The building, east of the hospital on Salk Drive, is owned by the Gebran brothers. The family also owns U.S. Egg restaurants in Tempe and Scottsdale.”