I'm watching this right now on Netflix Instant Queue.
Its a documentary about the competition in American beer. The woman who created it used to work at a A-B and she has interviews with the CEOs of A-N, Miller and Coors. There's some great pieces with the founders of Dogfish Head, Sam Adams, and Flat Tire. As well as footage of a woman promoting a new beer at Blanchard's in Allston, Marty's (old location) and a liquor store in Somerville.