50,000 thousand?
From the Barclay Center website:
“Barclays Center, which opened on September 28, 2012, offers 17,732 seats for basketball, 15,795 for hockey, and up to 19,000 seats for concerts, and has 101 luxury suites, four bars/lounges, four clubs, and 40/40 CLUB & Restaurant by American Express.”
Perhaps the additional 30,000 people will tune in via pay per view?