The bar isn't actually a communist front (I think), but more of just a heavily themed bar with communist decor and pictures of Lenin, Trosky, etc, etc on the walls.
None of the bartenders I asked knew the significance of September 12th. Would love to figure the significance of the date.
Anniversary of making it to the moon first.
"September 12th, 1959, the Soviet Union launched Luna 2, the first spacecraft to successfully reach the Moon."
http://www.historytoday.com/richard-cavendish/soviet-union-first-moon