INSTRUCTIONS: Make business cards for your character. If you like, you may hand them out when doing tasks for the game. You may want to make a calling (or "visiting") card instead:
The essential convention was that one person would not expect to see another person in their own home ... without first leaving their visiting card with the person at their home. Upon leaving the card, they would not expect to be admitted at first, but might receive a card at their own home in response. This would serve as a signal that a personal visit and meeting at home would not be unwelcome. On the other hand, if no card was forthcoming in return, or if a card was sent in an envelope, a personal visit was thereby discouraged.