In a medium bowl, mix the flour, baking powder and salt. Stir in the club soda and mix until smooth. Add the cheese curds to the batter and coat thoroughly.
Heat the oil in a large, heavy skillet or heavy-bottomed pot over medium heat until a deep-frying thermometer inserted in the oil reads 360 degrees F. Fry the cheese curds for about 1 minute, turning halfway through. Drain on paper towels. Serve the fried cheese curds with marinara or your favorite dipping sauce.