BY JENNIFER E. FALK | A strong city needs vibrant, active communities — and that is what we continue to foster in Union Square. We are proud of the progress we have made over the past four decades, and 2017 is poised to bring about even more progress. TAMI (technology, advertising, media and information) companies are continuing to flock to Union Square. Facebook has moved into its 200,000-square-foot space at 225 Park Ave. South — the same property that houses Buzzfeed.