What brewing company had a song commissioned by it and also has its management headquarters in St. Louis?
Under the Anheuser Bush: "Under the Anheuser Bush" was a popular beer garden song commissioned by the Anheuser-Busch brewing company in 1903. Anheuser-Busch:  Since 2008, it has been a wholly owned subsidiary of Anheuser-Busch InBev (AB InBev) which also has its North American regional management headquarters in St. Louis.
Anheuser-Busch