affair -
a vaguely specified social event; "the party was quite an affair"; "an occasion arranged to honor the president"; "a seemingly endless round of social functions"
ceremonial,
ceremonial occasion,
ceremony,
observance any activity that is performed in an especially solemn elaborate or formal way; "the ceremony of smelling the cork and tasting the wine"; "he makes a ceremony of addressing his golf ball"; "he disposed of it without ceremony"
fundraiser a social function that is held for the purpose of raising money
photo op,
photo opportunity an occasion that lends itself to (or is deliberately arranged for) taking photographs that provide favorable publicity for those who are photographed
affair -
a usually secretive or illicit sexual relationship
Affair may refer to professional, personal, or public business matters or to a particular business or private activity, as in family affair, a private affair, or a romantic affair.
OmegaWiki Dictionary
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affair Happenings which are connected with a particular person or thing.
affair A vaguely specified subject, question, situation, etc. that is or may be an object of consideration or action.