It's mean to criticize your host.
While at a cocktail party hosted by her friend a waiter spills red wine on Patty's dress.
Patty wants to inform her friend of what happened.
Patty informs her friend of what transpired and asks for help removing the stain.
Patty angrily condemns her friend for hiring incompetent staff for her party.
Patty's friend is mortified and offers a change of clothes as well as to pay for her dry cleaning.
Patty's friend excludes her from all future events that she is hosting.