We present a search for anomalous production of events containing a W or Z boson and additional leptons down to a low p_T threshold of 1-3 GeV. We are sensitive to clusters of leptons, or "lepton jets." The search uses data corresponding to 5.1 fb^-1 of integrated luminosity from $p\bar{p}$ collisions at a center-of-mass energy of $\sqrt{s}=1.96$ TeV. We find no indications of non-standard-model phenomena. Limits are set for a dark-matter inspired model of supersymmetric dark sector Higgs production.

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