Question on “trente sous”

Sunday I was in a café in Villeray, but not one of my regular spots, where I noticed they had notched the price of a double espresso up from the local standard $3.75 to a flat $4. Paid with a $5 and got a loonie back, so asked the barista politely for “des trente sous” instead, intending to leave 50 or 75 cents as tip.

She gave me back 30 cents.

I laughed and switched to English and explained I’d asked her for quarters, not thirty cents. Turned out she and her colleague were both anglos and had never heard the Quebec expression for a quarter.

Or was I wrong? Has that expression gone out of style?