MARINATED CHUCK ROAST: 1 (5 pound) chuck roast   1 cup barbeque sauce   1 cup teriyaki sauce   1 (12 fluid ounce) can or bottle beer   3 teaspoons minced garlic   3 teaspoons thinly sliced fresh ginger root   1 onion, finely chopped   3 teaspoons coarsely ground black pepper   2 teaspoons salt