<P> Jane Jarvis, the organist at the New York Mets' home Shea Stadium from 1964 to 1979, played the "Mexican Hat Dance" during the stretch . After the Mets switched to recorded music, "Take Me Out to the Ball Game" became standard . In recent decades, the Lou Monte tune "Lazy Mary" has followed it, continuing to play it at Citi Field . </P> <P> When the St. Louis Cardinals were owned by Anheuser - Busch, Busch Memorial Stadium organist Ernie Hays played "Here Comes the King", a commonly recognized jingle for Budweiser beer, during the stretch . On Opening Day, during playoff games and on "big nights" such as games against the Chicago Cubs, a team of Budweiser's mascot Clydesdale horses would also make a circuit of the warning track . Since Anheuser - Busch's sale of the Cardinals in 1996, "Take Me Out to the Ball Game" has been played in the middle of 7th inning, with "Here Comes The King" at the top of the 8th . Often, "Take Me Out to the Ball Game" is followed by an instrumental rendition of "Meet Me in St. Louis, Louis". The Clydesdales still appear on Opening Day and during the playoffs . </P> <P> The Toronto Blue Jays take the term "seventh - inning stretch" literally, as Health Canada officials lead fans at Rogers Centre in stretching exercises while the club's song "OK Blue Jays" plays before "Take Me Out to the Ball Game". </P> <P> The Miami Marlins, attempting to mimic the Blue Jays' exercising song in their inaugural year of 1993, created a group of dancers, some former University of Miami Sunsations or Miami Heat dancers, and called the group "The Seventh Inning Stretchers". At the first game this group came onto the field at the top of the 7th inning, and the crowd was encouraged to stand and stretch, and do a choreographed dance to Gloria Estefan's song "Get on Your Feet". The crowd, thinking it was the actual 7th inning stretch, booed loudly . The group appeared at the 2nd game the following evening, but was booed again and was never seen following that game . </P>

Where does the 7th inning stretch come from