"We'd listen to any sort of pitch," Mr Joyce said.
Chamber president John McRae asked members to raise their hands if they supported a casino with the vast majority of those attending putting their hands up.
During his speech, Mr Joyce said the key priorities in his upcoming budget were to invest in public services such as police, health and education, but also wanted to see better results from those organisations if they received further funding.
His second priority was to build better infrastructure for the expected growth in the country.
"But, it's also important councils focus on that as well...and chambers [of commerce] around the country need to make sure they keep an eye on what they [councils] do."
His third priority was to reduce debt, saying the global financial crisis and the Christchurch earthquake had seen New Zealand's debt grow to almost 30 per cent of gross domestic product.
And his fourth priority was to focus on people's incomes and looking closer at personal tax rates was an option.
He also said there was more work to do regarding youth unemployment in some areas of the country and that the challenge of providing infrastructure to keep pace with regional growth was a good challenge to have.