Comparison: Participants will be randomly assigned to: a Strengths-Based / Professional Only Condition in which clients participate in a "strengths-based" case management approach; or, a Strengths-Based / Professional/Peer Condition in which a team composed of: a) a credentialed, professional case manager and b) a recovering addict peer - both trained in "strengths-based" case management techniques - develop and facilitate the implementation of a service plan.