How great could a simple bean soup be? Just ask the folks in Washington D.C. where this famous soup has been on the Senate dining room menu daily for over 100 years! While no one can confirm the true origins of Senate bean soup we do know the soup has been served daily since 1903. Kinde, Michigan - Bean Capital of the WorldFound documents show the recipe for the famous soup specifically calls for "Michigan Navy Beans". Fun fact: Senate bean soup has been served daily since 1903 with one exception-- September 14, 1943, when wartime rations left Michigan navy beans scarce.