The locally produced food film, Polycultures, showed at the Cleveland International Film Festival earlier this year and then had a DVD release party at the Greenhouse Tavern. Now, it's showing in another local venue - the new Waterloo Cafe (15601 Waterloo Rd., 216.862.4895, thewaterloocafe.com), where it screens tonight at 8 with a discussion taking place afterwards. The film, which focuses on both the local sustainable food movement in Northeast Ohio and the history of the American farm (and why food quality hasn’t been a priority for the past 20 years), provides an extensive overview of what’s been happening in the world of food production for the last two decades. Divided into seven different “plots,” it’s almost too exhaustive in the amount of ground it covers. It also comes at a time when food documentaries such as Food Fight and Food Inc. are all the rage. The screening is free.