Eastern Orthodox/hand kissing
I know we kiss our priest's hand in church, but what about other settings outside of the church, such as at a bible study that is at one of the parishioner's home? Bumping into him unexpectedly at a store?
We kiss the hand of any member of the Clergy who holds the Chalice and from which we receive the Body and Blood of Christ. The hand which holds the Chalice is the hand which holds the Chalice no matter where or when we encounter it. It is the same hand in the temple as it is in the grocery store.