This has not happened to me in a while...BUT it does happen. (Read link above NOW!). I feel for the servers and I feel bad for managers who really have to endure the servers who ACTUALLY have to respond to the person who decides to stay at 9:58pm when a restaurant is set to close at 10pm. The guests tend to stay usually about an extra hour. Oh! and when the restaurant is corporate/chain/private group...etc... you must serve them with a smile. Your job may be on the line.
You will get a corporate person calling you first thing in the morning if you don't serve that guest...OR an Immediate e-mail to contact that horrible customer and apologize to them for being a douche.