R meetups and communities are thriving in cities around the world, but even identifying other R users at your workplace can be surprisingly difficult. While it's possible to develop expert-level R coding skills in isolation, it's much easier (and far more fun!) to improve your coding skills in cooperative communities of practice, encompassing users of various skills levels and working on different types of problems. What does it take to develop communities of practice at an institution or company? How do you assess what members of a community need or prefer? In this talk, I'll discuss my experiences supporting emerging communities of practice for coding skills at a large non-profit organization with many R users. I'll identify common impediments to community development, but also provide specific recommendations for facilitating and encouraging investment and cohesion in cooperative learning. (presented at Cascadia R Conference in June 2019, https://cascadiarconf.org)