Bars are a dime a dozen, but Kava bars are rare like little flowers sprouting up over the past decade in North Brooklyn. Kava is a beverage with a history that dates back over 3000 years. It comes from Polynesia, where it’s traditionally consumed in social and ceremonial settings because of its relaxing effects. The sudden closing of one, Bushwick’s House of Kava, has been a source of loud outrage among its employees and steadfast regulars, who consider the location a fulcrum of their local community, screwed by an owner whose conduct they admonish.