Flight
NYC has three major airports: LGA - shortest Uber ride into Manhattan or Brooklyn, has one public bus that drops off in Harlem. JFK - connected to Manhattan/Brooklyn Subway lines via the AirTrain ($10), can use contactless payments or a MetroCard. EWR (Newark) - connected to Manhattan via New Jersey Transit (buy tickets on the NJT app or at a ticket kiosk)
Train
The easiest way to get to Tribeca Rooftop will be via Subway and walking a few blocks from the station. We definitely recommend looking ahead with Google Maps or City Mapper to see what special Sunday afternoon service changes and obstacles the MTA has planned for us. Ubers to and from the venue will also be plentiful and readily available.