There is a growing recognition about a need to influence and change user behaviours in their own interest to meet several social challenges, be it at the level of an individual or society. Designers intentionally or unintentionally end up shaping the user behaviour. Service Design and Design for Behaviour Change have significant congruence in terms of concern for value creation over long duration, dynamic usage contexts and accounting for diversity of users, among others. However, despite the affinity of these two fields, we do not come across works that demonstrate practice that blends both the fields or synthesised design knowledge base. Practitioners might be tacitly blending these two disciplines. This workshop aims to understand these practices currently, the challenges designers are facing and how they are addressing those. We hope to uncover this tacit knowledge, provide preliminary knowledge from the disciplines and synthesise through hands on work followed by collective reflection.