Concert-goers will be able to party past midnight at the Barclays Center.
The arena will be able to sell liquor until 1 a.m. during events.
The Barclays Center had asked for a 2 a.m. cutoff but faced opposition from area residents.
Community Board 2 said the arena can apply for a change in the future if it finds the cutoff hurts sales.
By comparison, Madison Square Garden stops serving liquor 30 minutes before the end of concerts.
The NBA requires liquor sales to stop at the end of the third quarter.
Nets part-owner Jay-Z's 40/40 club is one of the drink venues at the arena.
Meanwhile, British rock is set to invade Brooklyn this fall.
Sources say The Rolling Stones are preparing to play two shows at the new Barclays Center in November.
The story was first reported by Billboard magazine.
Guitarist Keith Richards told the BBC in July that the band would do several live shows but stopped short of announcing a world tour in honor of the band's 50th anniversary.
The band will play two shows each in New York and London.
They'll join artist and part-owner Jay-Z, folk legends Bob Dylan and Neil Young and The Smashing Pumpkins in christening the new Brooklyn arena.
The Barclays Center is set to open on September 28.