The case was discussed before Associate Judge John Faire in the High Court at Auckland yesterday, where the defendants' lawyer Davey Salmon applied to have Lau's claims struck out.
Salmon said the claims could not survive in their present form.
Lau represented himself in court yesterday and said he wouldn't have been there if Metro had used the words "suspected scam".
"If they say 'suspected scam', I cannot do anything," he said.
Lau has also alleged he was defamed by Chisholm calling him an Amway "salesman".
Amway is an American company that allows third parties to buy wholesale health and beauty products and then sell them at retail prices.
Lau told the court he was not a salesman, but was an Amway "independent business owner".
As well as his defamation claims, Lau is seeking damages from the defendants after they allegedly "intervened" in his relationship with Sky City.
Lau said he would get at least $500 a week on average "tax free spending money" from Sky City, a free car park and occasional free accommodation.
He claims these benefits were revoked when Chisholm allegedly contacted Sky City and the plaintiff told the court yesterday he was now restricted from going onto Sky City properties for two years.
This meant Lau could not no longer take his business clients there, he said.
Although it was not made clear during the hearing how Lau would get the $500 a week, he told the Herald outside court that it was from gambling at the casino.
Together with defamation claim, Lau alleged Metro breached the Privacy Act and his "copyright" by taking a photo of him in a car park of his "training centre" without his permission.
Salmon refuted all of Lau's allegations and Associate Judge Faire reserved his decision on the strike out application.
Earlier yesterday Lau applied for a summary judgement in his case, but his application was denied by the judge. who said it was "fatally flawed".
Sky City would not comment on the case.
