In the 1980s, during the cocaine epidemic, there was a treatment center boom and a rapid increase of membership in addiction recovery groups. At the very end of that decade, a rising new talent, Gus Van Sant, made a brilliant film that defied the usual approach to how addicts are portrayed: from 1989, it’s Drug Store Cowboy. Matt Dillon plays Bob Hughes, a drug dealer and junkie in his 20s driving an old Cadillac sedan around the Portland Oregon area robbing drugstores with a small crew, consisting of his wife Dianne, played by Kelly Lynch, his friend Rick (James LeGros) and…