I don't know the origin of the 'Salad Bowl' name. I do know that there was an annual exhibition game that was dubbed the 'Salad Bowl'. Other games that I can confirm are:
July 28, 1964 vs. Saskatchewan
July 20, 1965 vs. Hamilton (Postponed from July 19)
July 17, 1967 vs. Toronto
July 12, 1971 vs. Toronto
Those were usually exhibition or early season games and the name was a promotion, I believe through either Safeway or Dominion.
A couple of notes on history. The Blue Bombers are still officially known as the "Winnipeg Football Club". In the early days of sports teams they did not incorporate and names were quite unofficial. It was not until after WW1 that organization really started in Canada, and after WW2 that anything approaching modern sport was around.
Organized sport started in the 1800s, and this included football in Britain. Each English school had their own rules for football. To make it better to have games between schools, and grads of the schools, they convened a big meeting to make one football code for everybody. The Rugby School decided not to attend the meeting, and one other school decided they would play by Rugby's rules, or "laws". Since Rugby's laws provided a game based on running with ball in hand, the Football Association chose to amalgamate the rules around playing the ball with your feet. So we got association football, or "soccer", as a result. The Rugby Football Union was also formed to standardize rules for rugby football, sometimes called "rugger".
Football clubs would often play by any code, soccer one week, rugby the next. And maybe once in a while a trip to Ireland to play Gaelic football. (IMO had Rugby School attend the meeting of the Football Association we would have had one world-wide football game today which would look more similar to Gaelic football than anything we now have.)
IAE, at that time, and for many years thereafter, there was little cross-Atlantic contact in the world of sport. Football was brought into Canada and the USA on a fairly casual basis. Rules were thus very localized. When teams from different cities played the captains would meet before the game to go over the rules for the game. When Harvard played McGill one day, McGill introduced them to Canadianized rugby football. Harvard had been more acquainted with "Massachusetts football", which to me sounds quite a bit like Gaelic football, without tackling. The Harvard guys liked it and they developed Americanized rugby football in the States. In most States "football" was soccer, sometimes with limited rules to allow players to carry the ball in their hands.
Canadian football was called "rugby football" well into the 1900s, though "English rugby" was also played. This
pdf article from 1926 shows the use of the term "English rugby" in The Ubyssey press for a game between UBC and Vancouver Rowing Club.
The Winnipeg Rugby Football Club, like others, played football under various codes. The exact date of birth of the club is not known. However, by 1926 the "English rugby" team was known informally as the "Wanderers" and continue to operate to this date. (An obituary from a good 20 years ago described the deceased as having played rugby football for the Wanderers since 1921, so these dates are subject to some debate.) The current Winnipeg Football Club was set up as a separate entity since 1930, to play Canadian rugby football.
The Blue Bombers issued a commemorative hoody in Bomber colours and with both logos on it about 4-5 years ago, which was not available to the general public.
