Harper spent a half hour Sunday chatting with the residents of Trinity Lodge and posing for photos before the main event.
The prime minister was partnered with Metha D'Amico in a four-handed game.
Harper dealt the hand and asked "you sure all the cards are here" to gales of laughter from the dozens of seniors watching.
"I don't think I want to play this guy for money," the prime minister said.
"We have a crib tournament every year at Harrington Lake, but I never win. My daughter is very good."
Harrington Lake is the official retreat of the prime minister.
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