"The Social Saboteurs: How Narcissists Wreak Havoc on Every Gathering"

TL;DR
Narcissists have a knack for ruining social events by hijacking conversations, making celebrations about themselves, refusing to let go of perceived slights, using vulnerability against others, creating conflict, embracing the victim role, self-medicating, manipulating timetables, and expecting extravagant gifts. It is best to avoid inviting narcissists to events as they not only don't care if they ruin the festivities, but they often hope to do so.
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