5. The entrance announcement
If you're Kate and Wills we can understand the historical importance of announcing the arrival of a newly married couple to the room they were standing in just 30 seconds ago, but, alas, we are not all royal. There's nothing more cringe-worthy than having a waiter announce the arrival of the bride and groom into a room full of people, who then have to stand up and clap. It's just plain weird.