Supporting Assembly candidate David Campos has gotten a little kinkier.

The San Francisco supervisor hosted a fundraiser Monday night at a Mission District adult film studio that bills itself as "the largest fetish porn company in the world."

Donors got a tour of the Kink.com studio - a hulking, Moorish-style brick castle that celebrates an erotic subculture involving dominance, submission, role-playing and lots of restraining devices - as well as food and drinks at the studio's bar across the street.

There, broad-shouldered men wearing only bow ties for tops chatted with models and donors while drag queens and porn directors picked over a platter of chicken wings laid out below a painting of a woman wearing a ball gag.

Many political insiders in Sacramento said they nearly dropped their morning coffee when reading about the planned fundraiser in a popular political roundup because most candidates raise campaign cash at upscale restaurants, casual coffeehouses or the homes of the well-to-do.

"My first reaction was why would anyone promote this, and who would want to be seen going walking out with a bag of goodies?" said veteran Democratic political consultant Steve Maviglio. "It seems like raw meat for his opponent, even in the most liberal district. I imagine a lot of donors would cringe when reading about this."

'Well-rounded man'

Campos all but rolled his eyes at that statement.

"Maybe that same thing could be said about other things that make San Francisco unique, like the Folsom Street Fair," he said.

Dennis Kelly, the president of the San Francisco Unified School District teachers union, which endorsed Campos, said the event didn't raise his eyebrows. The California Teachers Association also is endorsing Campos.

"You have to remember this is San Francisco," Kelly said. "I don't think it's something we would invite our members to, but David Campos is a well-rounded man with many constituents and many interests."

After the "stimulating guided tour," as the invitation put it, campaign supporters crossed the street to the Armory Club, a cocktail bar owned by Kink.com.

Campos campaign manager Nathan Allbee said the event, which drew 30 to 50 attendees, may have been unique, but it's "within the range of what San Franciscans are used to."

"There are a lot of fundraisers and community events held at the Armory," Allbee said.

Campos, a Democrat, is facing fellow Supervisor David Chiu in a race that has just begun to heat up. As recently as February, Chiu held a double-digit lead in polls, but Campos has been closing the margin. Both are seeking the seat of termed-out Assemblyman Tom Ammiano in District 17.

Nikki Darling, 26, a model at the Kink.com studios, said she would absolutely vote for Campos.

"There's no shade or no way to misunderstand what we do," Darling said as she sipped Champagne in a skimpy, two-piece outfit. "He's making a conscious decision to be here."

Owner's backup plan

Kink.com owner Peter Acworth, a bondage enthusiast who purchased the landmark Armory building on Mission Street in 2007, is no stranger to politics of late.

Acworth said he had invited Campos to have a fundraising event at the space.

"Campos is a different kind of politician," Acworth said. "He embraces the diversity of the people here."

Acworth is seeking the city's permission to convert the Armory into office space, a kind of backup plan he said was needed if state and local health oversight regulations push him out of the state.

Assemblyman Isadore Hall III, D-Compton (Los Angeles County), is attempting to pass a bill that would require condoms in adult films, as well as documentation of protective measures taken during all sexual acts.

Low price tag

Cal/OSHA regulations already say performers should use condoms, as well as dental dams and eye protection to protect against the spread of blood and fluid-borne diseases, such as HIV, hepatitis and herpes.

Two actors for Kink.com tested positive for HIV in September, which shut down adult film production across the country. Acworth told The Chronicle last month that neither was infected on a film set and no actors who worked with them tested positive for the virus.

Tickets to the Campos fundraiser ranged from $50 to $300, a price tag considered low for most political fundraisers.

"To their credit, there is always a laundry list of creative fundraising events where candidates try to break the mold," Maviglio said. "This certainly does."