From “Fight Club” to a different kind of group. Brad Pitt’s participation in an Alcoholics Anonymous group was what helped him get sober following his 2016 divorce from Angelina Jolie, he told GQ in the magazine’s August cover story. “I had a really cool men’s group here that was really private and selective, so it was safe,” the 58-year-old Oscar winner said about his 18-month experience in Alcoholics Anonymous. But the actor had some initial trepidation, given horror stories he’d seen play out online involving those in AA. “I’d seen things of other people who had been recorded while they wer…