To celebrate Black Music Month, the Rock and Roll Hall of Fame and Museum will host the 17th annual Rock and Soul Festival from noon until 4 p.m. today. Musical performers include rapper/beatboxer extraordinaire Biz Markie, who’s best known for his infectious ’80s hit “Just a Friend,” as well as West Side Community House’s Summer of Sisterhood, Humble G Tha Fiddla and Crybaby Gangsta. Weather permitting, the event will take place outside in front of the Rock Hall. The concert is free and no RVSP is required. (Niesel)