This document discusses effective strategies for building advocacy capacity among service provider coalitions. It begins by defining coalitions and exploring their typical life cycles and functions. It then examines traditional coalition membership and challenges coalitions may face. The document suggests recruiting non-traditional members from outside the service sector can help address challenges and increase capacity. Examples of non-traditional members include students, journalists, and bureaucrats. The Immigrant and Refugee Housing Committee is provided as a case study of a successful coalition that utilized non-traditional membership.