This Weekend THIS WEEKEND OCTOBER 4, 2012 Brew School: Chicago Beer Festival If you missed the debut this spring, Union Station once again transforms into a craft beer-soaked nightclub. Party pair: Pair dozens of microbrews (including rare Granite City and Hopothesis) with sausages, burgers, and garlic fries. Sat 1-4p & 6-9p. Union Station Great Hall, 225 S. Canal St., Loop. $40 per session here. Nearby: Epic Burger; Bacino's; Venice Cafe Laugh Factory: Four Star Comedy Fest Actor/SNL album Tim Meadows headlines this inaugural event, with free improv workshops for budding wise guys. Back up: Meadows follows opening performances from cast members at Second City and Improv Olympic. Sat 1-11p. Navy Pier Grand Ballroom, 600 E. Grand Ave., River East (800-745-3000). $39-99 here. Nearby: Billy Goat Tavern; The Links; Riva Art Mart: Chicago Artist's Month Kickoff at Bridgeport Art Center Visit the Sox's hood for a Friday block party with a pig roast and craft beer festival in the center's sculpture garden. Party on: Jams continue Saturday at House Music Block Party featuring the new electronic project 8fatfat8. Fri 5-9p & Sat 4-9p. Bridgeport Art Center, 1200 W. 35th St., Bridgeport (773-247-3000). Craft beer fest $30 here; all other events free. Nearby: Happiness; Iron Street Farm; Thirty Fifth Street Cafe Flash Mob: The Great Fire: A Traveling Truck Show The circus comes to the Logan Square Blue Line stop with a pop-up street theater performance. Line up: Belly dancers, snake charmers, and a Chaplin-era accordion player will roam the crowd. Sat 5p. Logan Square Blue Line stop, 2620 N. Kedzie Ave., Logan Square. Free. Nearby: Logan Theater; Longman & Eagle; The Owl