There aren't too many things worse than having nice dinners at restaurants ruined by waiters who act inappropriately or stupidly. Some things waiters should and shouldn't do seem obvious to the diners but sometimes manage to escape the servers. If you are in the restaurant business, there are some very basic principles to know.
For starters, don't hang around the guests while they are eating. Shortly after their food has been served, you should pop over and make sure they are satisfied with everything. Then leave them alone to enjoy their meals. Scan the room frequently to see if any of your patrons are trying to get your attention.