Antone’s reopened downtown last year three blocks from its original 1970s location. Inside, the show posters lining the walls from the likes of B.B. King and Ray Charles read like a Blues Hall of Fame. Now the two-story venue aims to not only bring in big-name acts coming through town, but to introduce showgoers to great music, including artists they may not have heard of. It also helps that hometown hero, musician Gary Clark Jr., who played some of his early gigs here, is also a partner.