It was originally inspired by American Folk Music. Which yes, was one musical descendent of Celtic music--the early form of music in the British Isles.
This is a fun video, that shows "man and beast" running together at the Fota Wildlife Park in Ireland. The park is a non-profit organization, that promotes conservation, education and research.
The Irish Car Bomb (a shot of Bailey's plopped in a pint of Guinness) is a popular drink around St. Patrick's Day, though some be surprised to hear it didn't originate in Ireland. In 1979, Charles B. Oat created the drink at Wilson's Saloon in Norwich, Connecticut, according to a booze blogger who studied bartending under Oat.