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Some of us grew up dreaming of living in a palatial estate with more bedrooms than we have fingers and toes. While the thought of dozens of bathtubs is nice, unless you’ve got a family of 10 or an entire commune to house, some rooms will go unused. So, a group of motivated builders asks, why not build small? Tiny houses are homes of around 325 square feet (the minimum size for a legally livable unit) built on top of trailers so they can be easily moved from place to place. The film Small is Beautiful highlights the experience of four tiny-house residents in Portland, Ore., chronicling the building process and examining how living in a smaller space with fewer personal belongings can decrease debt. It screens at Woolly Mammoth Theatre Company as part of a presentation by the local tiny-house activists from Boneyard Studios. If you’re persuaded to go small after viewing the film, enthusiasts will be on hand to answer questions and provide construction tips. The film shows at 8 p.m. at Woolly Mammoth Theatre Company, 641 D St. NW. $15. boneyardstudios.org.