Unlike at your home, restaurants serve large quantities of food for long periods of time. Customers or servers may accidently drop food on the floor. Large industrial kitchens also have plenty of areas where grease and food can get trapped. Cleaning serving areas frequently and scouring all areas where food is prepared can minimize any pest issues.
Dumpsters and other garbage areas also need to be closely monitored and kept well clean. Closing dumpster lids and emptying them frequently should keep any pest issues to a minimum. Tamper resistant lids for your food storage areas and dumpsters are also a good idea. Cut grass and weeds along dumpsters or fences rows to eliminate hiding places for rodents.