Cambridge Brewing Company will celebrate its twentieth anniversary this weekend with a two day extravaganza featuring over thirty beers, live music, and a beer garden! Beers on tap will include CBC’s legendary Benevolence, which is aged in bourbon barrels. Chef David Drew is also offering some anniversary specials, including the Sgt. Pepper Braised Rabbit, complete with baby vegetables and herb butter, served atop peppercorn pappardelle. Admission to the event, which starts this evening and runs through the end of the night tomorrow, is free, but arrive early because it’s likely to be packed.