"Let's go ice-skating at Radio City!"

Radio City at the Rockefeller Center
Creative Commons AttributionRadio City at the Rockefeller Center - Credit: Randy Lemoine
Sally means the ice rink at Rockefeller Center (where Radio City Music Hall is located).  It opened in 1936, and remains a very popular tourist attraction and iconic New York City scene.

 

 

Sally wants to see how she'll look in a skating skirt.  Pretty damn cute.