Besides stuff like open body language, speaking slowly and clearly, what are some things that dominant people do in social situations that are very subtle to notice as dominant?

For example if in a house party full of friends, there is someone new there, guy or girl, the dominant people will always be the ones who introduce themselves to the new comer and "engulf" them in to the friend circle, so to speak. Its subtle, but subconsciously the newcomer will think that that person is the more dominant one. At least initially, until proven otherwise.