Armstrong Park was a popular park located near the French Quarter in New Orleans, Louisiana on Earth, which was known for its jazz music.
Jake and Joseph Sisko planned to visit Armstrong Park in 2375 to listen to some of the local music. Jake invited his father, Benjamin Sisko, but the invitation was declined. (DS9: "Image in the Sand")
Armstrong Park, an open public square with grass and trees, was named for the 20th century jazz musician Louis Armstrong. (Star Trek Encyclopedia, 4th ed., vol. 1, p. 45)