Speaking on "Morning Joe," de Blasio said the tone of his relationship with police was "much better."
Brooklyn Councilman Brad Lander called the legislation the "toughest" protections in the country.
Union response to de Blasio softens as city mourns shooting death of officer Brian Moore, 25.
The site opened in January in response to this winter's frigid temperatures.
The gun was stolen with 23 other weapons from a bait and tackle shop in Perry, Georgia, police said.
NYPD officer Brian Moore was shot in the head by Demetrius Blackwell, officials said.
The mayor said the city respects non-violent protests but participants must obey police commands.
The move comes after a SNUG employee was arrested Thursday for pulling a knife on a colleague's spouse.
The bill, sponsored by Councilman Vincent Ignizio, was approved by the mayor.
Clinton referenced Garner in her first major policy speech which focused on criminal justice reform.
The move comes after DNAinfo reported that the program, staffed by ex-gang members, is under scrutiny.
The plan proposes aims to address inequality through improvements in transportation, health and economy.
The mayor says the area is one of the densest in the city not directly served by a subway line.
The mayor said he was unaware of problems at the Mission Society's Harlem SNUG site.
The mayor used the tools at his disposal to push his issues onto the national stage.
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