It’s almost time to put away your white pants for the season, so Dorchester Brewing is giving you one last occasion to get them dirty. On Sunday, August 27th, between 12:00 and 3:00pm, they’re hosting the Great Boston Rib Fest, bringing some of the area’s best pitmasters to their Mass. Ave. tap room for a real smoke show-down. Competitors include Blue Ribbon BBQ, Ashmont Grill, Lucy’s American Tavern and M&M Ribs, all vying for the title of Best Rib in the Business. The event is free, and a suggested donation of $5 will go to a charity of the champ’s choice. All you have to do is show up, eat, and vote. For more info, click here.