An original way to serve desserts in a cocktail party is precisely through another "cocktail". Most of the people tend to skip dessert when they are drinking alcohol. Here is a smart way to treat your guests with a dessert that they won’t refuse.
In a blender, put vanilla ice cream, Kahlua (coffee liquor), Oreo cookies and a little bit of ice. Mix it for about 1.5 minute or until you get a "smoothie" texture. Serve them in clear shot glasses with small straws and pass them around in a tray. You will accomplish coffee and dessert in just one step without interference with the cocktails. In addition, it will give your guests 'just a taste' so the caloric intake is much less. Your dieter friends will love you for it. Expect that each guest will drink at least 2 dessert shots so prepare enough.
Did I mention that it only took 2 minutes to prepare dessert?
Cheers!