Lopez suffered a broken nose, swelling to his face and head and bleeding on the brain. He's at Westchester Medical Center.
He's the brother of mayoral aide Lorraine Lopez.
Police say a man entered Sal's just before 5 a.m. and was soon asked to leave because he was disturbing other patrons..
Police say moments later, Lopez left the bar and was jumped and viciously beaten by the unruly patron and another man.
Police say he didn't know his attackers, who remain at large.