On the plaza were chairs, a Starbucks kiosk, and, naturally, a stand selling Brooklyn Nets gear. They didn't mention the latter in the pre-event publicity, but why pass up the opportunity.
#Treatyourself to some new @brooklynnets gear & some of #Brooklyn's best food trucks at the @nydailynews plaza! We're here until 5pm today.Vine video via Barclays Center Community Affairs Manager Terence Kelly--note the Nets shop at the very beginning.
— Barclays Center (@barclayscenter) June 1, 2013
According to my own and others' observations, it was busy at lunch time, slower later. Visitors really sought the shade, so future events will do better if they supply umbrellas for shade.