Tonight at 7 p.m., the Flying Saucer Draught Emporium (101 E. 13th St.) is tapping a cask. Bell's calls Hopslam Ale a Double India Pale Ale; you'll call it delicious. But be forewarned: Behind the fruity, hoppy wonder beer is an alcohol by volume of 10 percent. Charlie Hooper's, Waldo Pizza's Tap Room and the Martin City Brewing Co. all had Bell's Hopslam on tap this past weekend. Has anybody had a chance to try this year's batch?