Publishing photos of people without their permission
I have prepared a color brochure to market casino parties in Florida. On the brochure I am planning on using still shots taken of people at a recent casino party. Gambling is not allowed in Florida. This is merely a recreational, no-money-involved endeavor. My question is: Must I get permission from all the people appearing in these photos in order to use the pictures on the brochure? Or is it within the law to show photos of people having fun around a mock gaming table without having them sign a release?
Thanks for your opinion!