Let your guests be guests.
As an experienced photographer I am making sure you get your posed images with your VIP guests, but I am also capturing all of those in-between moments. Like the guys with two decades worth of friendship telling stories with boisterous laughs. Or the look of shock on your face when your friend who you haven't seen in years decides to surprise you by coming to your party.
You and your guests will not be standing around looking for these moments to capture.
You and your guests ARE the moment to capture.