Restaurant chain gives away signature Grand Slam breakfast for eight hours . Patrons line up outside eateries , jam into booths with strangers . Score: 6 Meal of pancakes , eggs , bacon , sausage reportedly packs 770 calories .
Restaurant chain gives away signature Grand Slam breakfast for eight hours . Patrons line up outside eateries , jam into booths with strangers . Denny 's announced promotion during Super Bowl commercial . Meal of pancakes , eggs , bacon , sausage reportedly packs 770 calories .