Somebody is always watching in Marcel Lozinski’s deeply unnerving and at times hilarious hybrid documentary about a summer camp for young families run by the Union of Young Polish Socialists. Amid rickety lakeside cabins, husbands and wives are observed and graded on their political commitment and their participation in activities, with nosy supervisors awkwardly dropping by to ask questions. Lozinski, a leading light in Poland’s rich documentary history, is keenly attuned to the satirical and dramatic possibilities of the bizarre situation, pitting one overeager official (who neatly illustrates the tendency toward cronyism) against an outsider couple who couldn’t care less about the whole charade.