Many years ago, my father told us a "secret" then shared by many business men (now called business people) about this specific part of Sherbrooke Street East.
The secret was, on this part of Sherbrooke Street, some of the business men - there were very few business women in those days - invited their mistress for lunch and their wife for dinner, never the other way around.
Some kind of an unspoken rule in some kind of a men's club.
This part of Sherbrooke Street East was then completely unknown to me but, this is how it looks now, with the TIKI sign being the last remnant of another and very different day and age.
My father, my mother and I were sitting together in our kitchen when this conversation took place.
So ... my conclusion was and still is, my father did invite customers for lunch
in what was then a popular area, but he did not have a mistress.
As for the conversation my father and mother may have had afterwards, I was no longer around.
An area that is now being replaced by a rather large and rather fancy apartment buildings similar to the one already located on Sherbrooke Street corner of Assomption Street.