Is it customary for the groom-to-be to stop by the wedding shower (not stay for the whole thing but to drop in at the beginning or the end)? The shower is mainly going to be friends and family from my side, and approximately half the guests have not yet met him. Just curious if it is customary or typical for the groom to stop by to thank people for coming and their generosity and meet some of the more extended family he hasn't yet met before the wedding and how others have handled. Thanks!