Watching ballet is like watching embodied calligraphy set to music.  Nowhere else can you see the most precise movements so elegantly executed, with technical feats appearing as effortless as water swirling in a vacuum.  The opening gala for the San Francisco ballet is a special occasion celebrating all of the choreography, set design, and more that goes into each production, a taste of the many talented artists in the city’s gorgeous opera house.  But in addition, it provides an opportunity for those who support it to dust off their finery, and they did not disappoint.