Jay-Z has joined forces with his promotion firm Roc Nation to take out full-page newspaper adverts to promote local black businesses across the US.The rapper took out the adverts in titles including The New York Times, The Los Angeles Times, The Denver Post, The Chicago Tribune, and many more, drawing attention to a variety of different Black-owned businesses across those cities.They range from law firms to clothing stores and restaurants, with the advert actively encouraging readers to use