BILLBOARD SHOW: Alexander Wang always seeks for novel ways to bring his runway show to the public, and this season, he is doing so in a partnership with Barneys. Shortly after his show on Saturday, Wang will unveil his new billboard with Barneys on the corner of Seventh and Greenwich Avenues. To celebrate the launch, the spring show will be projected onto the billboard, and will continue to appear there for two months. Those who can’t get downtown, however, can watch the show from the comfort of their homes. Wang is also livestreaming the show on his Facebook page.