In commemoration of the unveiling of Beastie Boys Square and 50 years of Hip-Hop, Mike Diamond (Mike D) and Adam Horovitz (Adrock), in association with The City of New York and Council Member Chris Marte, will be celebrating in the Lower East Side on September 9 beginning at 12:00 pm. on Rivington Street between Ludlow and Essex Streets. The celebration will go on until 2:00 p.m., and will feature a special guest DJ set by Jon Bless HiFi System, pop-up activations, and more.