What’s a Brewmastermus? It’s something like Christmas, Festivus, and a bake sale all in one. Cookie masters T-Rex will be at the brewery selling their handiwork, and Insight is serving four different beers made with actual cookies from the company. Cask tapping will begin at 6 p.m., proving that two good-on-their-own ingredients can be even better when they team up. Are cookie beers the next big thing? Possibly. Amid the revelry, the brewery will also host Too Many Banjos, featuring local musicians Marc Gartman, Dave Carroll (Trampled By Turtles), Jillian Rae, and Steve Garrington. In the spirit of Festivus, there will be organized feats of strength and an airing of grievances as well.