In Taiwan, Western food has replaced Chinese cuisine, and coffee consumption is rising. Previous studies have suggested that Experiential Marketing (EM) can improve Customer Satisfaction (CS), Brand Loyalty (BL) and trust (TRT), while Brand Image (BI) impacts a brand’s perception. Furthermore, Relationship Quality (RQ) has three key dimensions: commitment (COMMIT), TRT and CS. Starbucks, a major brand in Taiwan, was chosen for the relationship marketing study. Using Structural Equation Modeling (SEM) on 294 valid respondents, this study examines six hypotheses as well as the moderating effect of EM. The results showed three mediating effects centered on CS, and EM moderated the pathway between TRT-CS and CS-COMMIT.