WE'RE FANATICAL ABOUT GETTING TO KNOW CLIENTS Blackstone Agency is a full-service Strategic Marketing and Branding Agency located in South Florida. We have a track record for getting to know the companies and brands we work with and understand them sometimes more than owners themselves do. Located in South Florida, Blackstone Agency is a full-service Strategic Marketing and Branding Agency. We have a successful track record for developing an in-depth understanding of the companies and brands we work with ( sometimes more than owners themselves do.)