(WXIA) -- In July of 1958, the very first International House of Pancakes opened in Toluca Lake, Calif. Today, IHOP has 1,627 restaurants in all 50 states, the District of Columbia and several countries across the globe.To celebrate its 56th anniversary, the chain will offer its signature buttermilk pancakes for less than they cost in the 1950s.On Tuesday, July 8 from 7 a.m. to 7 p.m., IHOP...