FIKA is an 18 card print and play game in which two players try to win rounds by selling coffee, tea and pastry. It comes with a solo mode. From the BGG description:
Players must use the actions and goals on their cards and the cards in the FIKA supply in order to outsmart their opponent. The player that can win two rounds by getting the maximum value out of his cards, wins the game.
I like these mini games. They’re easy to print and assemble, and for a couple of bucks worth of ink and paper, I can get a nice filler game.