What is the fine-grained topic of the following text: In what will hopefully be a preview of 2015, Smorgasburg has brought together 30 favorite food vendors to put on their best show at a Smorgasburg at SummerStage Central Park for one night only: Friday, September 19, from 5 to 9pm. Only return the topic.
Smorgasburg food event at SummerStage Central Park