Something special happens when you turn 21. You can go out by yourself and pick up a six pack without awkwardly searching for excuses as to why you don't have your ID with you. What happens when a brewery turns 21? They have an even bigger party than you did on your 21st. This year Harpoon Brewery is turning 21 and the annual Brewstock festival will be part of the celebration. Big top tents will be set up at the South Boston waterfront brewery, bands will play, BBQ will be eaten, and, of course, beer will be flowing. Friday night's lineup includes El Gringo, The Fools, and Rippopotamus. Saturday Joel Cage, Three Day Threshold, Otis Grove, Six Day Slide, and Clutch Grabwell are among the performances scheduled.

You can't purchase tickets in advance for Brewstock – they sell them at the door until their tents are packed to capacity. But thanks to the brewery we've got some passes to give away that will get you in Friday night without paying the cover charge. Drop your info below for a chance at grabbing some passes. We'll mail out the passes early next week. Over 21 only need enter, it's a beer festival silly.