Two against the world 16-20
It is by the protocol and ceremony, that when new mayor is elected, he will pay a visit to the zpd, to host a small and formal party, just like lionheart did when he stepped into his title the first time.
Swiss Mix - Chapter 226-250 (Revised)
"unless we're holding a formal party, for a very large number of guests, the maids eat their meals with us." all of the maids were present for the formal dinner to welcome the new guests and the master's son.