Mettre la table = set the table. So the French correspondint to your translation would be something like "Mise DE la table".

Se mettre à table - sit up, sit at table, for which the noun would be something like your "mise à table", but I can't fit this sense in with "des traditions".

However, there is the familiar expression "se mettre à table" meaning to confess, admit, cough up.

Now THAT I can associate with "des traditions" - maybe something like "putting tradition to the test" (in the sense of testing with fire).

I also think there is a possibilité of "table" here implying "table rase", and therefore a "levelling of traditions" - applicable if what they want to say is that traditions are comparable around the Med. basin.

Simply food for thought. Without the text, we're helpless, and your client should be told to shine up his act.