Chris Brownspent big money clubbing after Hot 97’s Summer Jam Sunday. The singer and his entourage of 20 partied at Pink Elephant, where we’re told he ordered a round of 20 bottles of Ace of Spades Champagne at $1,000 a pop. His generosity didn’t stop there, leaving a waitress a $5,000 tip, says the source. Later, Brown took his tour bus to EVR, where he met up with Sean Kingston.