In a large bowl, toss together iceberg lettuce, romaine lettuce, bacon, cherry tomatoes, and 1/4 cup chives.
To make the dressing, whisk together buttermilk, mayo, sour cream, 1/2 of the blue cheese, garlic powder, Worcestershire sauce, lemon juice, and 2 tablespoons chives in a medium bowl. Season to taste with salt and pepper.
Pour dressing over salad, toss to combine, and top with remaining blue cheese crumbles. Enjoy!
