Starting September with a bang, the city is serving up everything from major fashion showcases and underground art exhibitions to caviar on gelato. If runway shows and designer labels are not quite your scene, or dessert is not your thing, there is also a three-day health and wellness festival happening at the same time. Here are five things to do this weekend. 1. Messina x Nomad Caviar Ice cream purveyor Messina has teamed up with Hong Kong-based Nomad Caviar for a limited-edition collaboration...