Very few nations take their ice cream as seriously as this nation, which is served by the Coppelia chain of ice cream establishments. In this nation's capital, the central Coppelia restaurant takes up a city block and can seat 1,000 diners, and was started as a project proposed by this nation's then leader. Identify this nation which originally saw Coppelia offer 26 flavors, allegedly in reference to 26 July 1953.
Cuba