What I always do is to retire in the bedroom and change into my pajamas. I then reappear at the table declaring that I am going to bed and that those who want to go can go, and those who want to stay can stay, with the last person making sure that the front door is closed. This usually has the immediate effect of everyone being embarrassed and getting up to leave. It is so much better to make your guests be the last to feel embarrassed and not yourself.
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Circumnavigator, lawyer and columnist and the man who divides his time between Singapore, Hong Kong and China. I believes that etiquette transcends nationality and race. 
In this column I will offer stylish advice to everyday questions on etiquette at work and at home and anything else that may be bothering you.