BRIC Celebrate Brooklyn free 2018 Prospect Park shows: Common, Gary Clark Jr, Antibalas, Branford Marsalis more. BRIC Celebrate Brooklyn! Festival has announced it’s 2018 season of free concerts in Prospect Park which opens June 5 with Common and wraps up with two killer shows: Godspeed You! Black Emperor and Emel Mathlouthi on August 10 and…