Cook chopped bacon in a skillet over medium-high heat 10 minutes or until crisp. Drain bacon, and set aside. Add minced garlic to skillet, and sauté 1 minute.
Beat cream cheese at medium speed with an electric mixer until smooth. Add half-and-half, beating until combined. Stir in bacon, garlic, blue cheese, and chives. Spoon mixture evenly into 4 (1-cup) individual baking dishes.
Bake at 350° for 15 minutes or until golden and bubbly. Sprinkle evenly with chopped walnuts, and serve with grape clusters and flatbread or assorted crackers.