In a food processor, pulse the blue cheese, mayonnaise, sour cream, lemon juice, Worcestershire sauce and garlic powder until smooth. Season with salt and pepper.
In a large skillet, cook the bacon over moderate heat, until crisp, about 5 minutes. Drain the bacon on paper towels.
Thread a few romaine leaves and bacon cubes onto each of 24 long bamboo skewers. Arrange the skewers on a platter and serve with the blue cheese dressing on the side.