In the highly competitive service markets, firms are recognizing the importance of customer retention. Retaining customers bring companies higher margins and faster growth. While relationship investment, relationship quality and switching barriers have been individually addressed by past studies, there has been little research integrating them with customer retention. With data collected from chained health clubs and SEM analysis, this research investigates whether a service provider can achieve customer retention through such customer relationship management practices. The results suggest that relationship investment positively affects relationship quality, leading to higher switching barriers, lower alternative attractiveness, and ultimate customer retention. Given the research findings, managerial implications and suggestions for future research are then discussed.