My question involves civil rights in the State of: CA
I had another access dispute this past weekend. Ironically, it was at an art event that benefits people with disabilities, including Service dogs. This man, who claimed to be an ADA attorney, only for businesses who get sued by us, asked to see documentation for my dog. I told him I wasn't required to have that. Explained he is owner trained, and that's my right. He begged to differ. So I showed him the law card I have, with the ADA and Federal Law on it. He gave it a cursory look, and handed it back. Then he made ME read it out loud. I asked for the police, and he pointed to a security off duty officer, and said there they are. Both threatened to physically remove me, and said I was trespassing, and would not sell me a ticket. I was unable to get the cop's name, but got his card with the security company on it. Nobody wanted to be a witness, not wanting to get involved. It was so frustrating that this attorney was pulling such a power trip on me, and looking at me like I was full of it. He said the ADA is a huge thing, and I'm taking a teeny part out of context. (Yeah, the part that pertains to this!) He asked where I got the law card, off the internet?

So I'm hearing that I don't really have any recourse against him personally. The event was organized by a charitable organization, and they would be responsible for his lousy behavior. The police wouldn't enforce the penal code, because there's no time frame for denying access and harassment. He did let me in, after almost an hour of this.
Is there anything I can do..or what should I do?