Sometimes the mayor’s much maligned — and much abused — 311 social distancing snitch line delivers.

Cops responding to citizen 311 complaints busted an illegal bottle club in Queens that was pouring liquor for multiple patrons gathered inside, NYPD Chief of Patrol Fausto Pichardo tweeted Saturday.

The unlicensed club in eastern Queens’ 105 Precinct was caught with stacks of beer cases and a trove of liquors, including Hennessey, Patron and Grey Goose vodka.

The windowless room was outfitted with a few tables and chairs, a TV and a bar at the back.

Residents used 311 to complain of illegal gambling at the club, though the hotline has apparently been a total bust for reporting groups ignoring social distancing mandates.

Mayor de Blasio’s social distancing snitching program is sending cops out on thousands of dead-end calls, the Post reported Saturday.

Still, the problem of since the state-mandated lockdown, the Post has been tipped off to illicit parties and speakeasies operating under the radar.