how cheap can people be

Today was another great day at work, if only you can sense the sarcasm in that.  People will do anything to get a free meal.  I am a bartender at my place of work as well, and of course it being friday and everything we were busy.  This couple sits at my bar top and orders all these drinks then decides to get dinner.  They get two chicken alfredos.  The meals come out and one of them says that they wanted penne pasta instead of fettucine, it comes with fettucine.  So my manager takes it back and gives them ziti in stead on penne.  Penne and ziti are basically the same thing, and they hard a heartattack.  They threatened to call corporate and everything.  So of course my manager takes care of the 90 dollar bill.  They left me no tip and when they leave I saw them give each other a high five.  People will say and do anything to get out of paying for things that they ordered.