I guess if you're hungry and really want Denny's food one approach is to try and convince the current manager that you are the new manager.  Of course, once they call 911 on you, you should probably ditch any unlicensed stun guns you're carrying just in case.

I must confess that the Denny's buffalo chicken sandwhich is my favorite sandwhich from any restaurant anywhere, so maybe I can sympathize with the guy trying impersonate his way into getting a Denny's meal. 

File that under mmm... buffalo.