Police will be giving a lot of extra attention — including in overtime work — to one club before it closes next month.

After a recent shooting outside the popular Whisper nightclub at 535 Florida St. in the Mission district, San Francisco police are warning more violence is likely. For years, violence attributed to nightclubs has plagued the North Beach, Mission and SoMa neighborhoods.

The nightclub, battling legal troubles and subject of a number of complaints, plans to shut down May 3. But that gives the club time for a final hurrah, which has police on edge. The club is advertising on its Web site a “last-blast reunion grand finale.”

“This location has potential for additional violence or casualty due to overcrowding, lack of adequate security or the presence of persons motivated/encouraged to commit violent acts by the type of entertainment and or music,” Mission Police Station Capt. Stephen Tacchini wrote in an April 14 memo that was obtained by The Examiner.

In the letter to the top brass and police Chief Heather Fong, Tacchini requested more resources for enforcement outside the club — each weekend until it shuts down — including overtime pay, motorcycle officers to help prevent drive-by shootings and members of the gang task force because club patrons “may be members of gangs [that] are in conflict with one another.”

Tacchini said the club owner “is desperate to make as much money in the limited time he has left,” and he’s uncooperative and not concerned “for the safety of patrons or persons who live in the area.”

After the shooting, The City approached the club owner and suggested he shut down immediately and abandon the closing-out weekend events.

“[The club owner] is a businessman. Why should he close down?” said Matthew Kumin, an attorney representing the club owner. “My client is operating his business as he is legally and lawfully allowed to do so.”

Kumin said his client operates a safe club, and “that’s not my client’s problem” if people do not act responsibly in the area outside the venue.

Legislation sponsored by Mayor Gavin Newsom and Supervisor Sophie Maxwell is pending before the Board of Supervisors, which members of the Entertainment Commission said would prevent situations like those at Whisper.

The legislation would empower the commission to shut down a club for 72 hours immediately following a violent incident, and more expeditiously impose conditions and prolong closures.

“I don’t have the ability to close [Whisper] without a protracted hearing,” commission Executive Director Bob Davis said. “[The owner will] be out of business by then.”

Instead, The City is left to rely on the Police Department.

“The police are going to try and provide additional coverage to forestall any acts of violence,” Davis said. “There’s an absolute cost to this at a time when The City can’t really afford it.”