Dining in the continental manner, eh? What does that mean? Perhaps it refers to the design of the place, which requires the waiters to go all the way around the fake plants in order to serve the customers, thereby reminding them of their stature. They are SERVANTS.
The Mayfair was in the Leamington Hotel, a bygone Minneapolis landmark. (Obviously not that much of a landmark, obviously, since it’s gone.) A detailed look at the hotel, here.