I like CoSo Cabana a lot! It's catchy & provokes positive, laid-back conversational vibes.
I also think there is something about simple, single syllable terms (i.e. Space, Pod) that people tend to lean towards because they're short/easy to reference. "Circle, Square, Green, Pool, Haunt, Quad, Sphere, Nook, Joint (double entendre with that one), Den.
Guessing you already know what might best fits the CoSo brand. I like CoSo calls b/c it has a chat option for non-voice listeners!