Guests arrive, glance up, and immediately start pointing their phones at something eight feet tall that has just waved at them.
Stilt walkers are the easiest way to make an entrance feel like an occasion. They greet people at the door, tower through a drinks reception, pose for photos all night and generally turn a bit of standing around into something worth talking about. Costumes can be built around whatever you are doing, from black tie elegance and winter wonderland to full carnival colour or something properly strange for a themed party.
They need no stage, no sound and no running order slot. They simply exist above your guests looking spectacular, which turns out to be exactly enough.