Preheat oven to 400°F. Lay strips of bacon on a baking sheet. Mix brown sugar, coffee, salt and pepper together in a bowl. Sprinkle half of the spice mixture over the strips of bacon Bake bacon for 10-12 minutes or until crisp. Preheat a skillet or griddle to medium-high. Sprinkle remaining spice mixture on both sides of burgers. Add oil to skillet/griddle, then add burgers. Cook burgers 3-4 minutes per side. Remove burgers from pan/griddle. Toast buns on griddle for 30 seconds-1 minute. Top burgers with Swiss cheese, barbecue sauce and bacon, then serve.