Riunite is a winery in the Emilia-Romagna region of Italy. Lambrusco is a fruity, light variety of red wine. A glass of Riunite Lambrusco has fewer calories than a typical red wine. One serving of red wine is 5-oz. A glass of Riunite Lambrusco contains 98 calories. It has 3 g of carbohydrates, but not any fat, sugar or protein.