CuVRball is using Discord for finding friends to play with, and also voice chat. This makes it easier to organize groups with the lower player count that VR games have. There is currently in game voice chat used by hitting the grip buttons, but Discord is recommended for higher quality. You can join here:
If you are not familiar with how Discord works, please consult this amazing chart:
I (the developer) can usually be found in Discord chat, so if you have any questions, suggestions, or ideas, feel free to stop in and talk. If I am not available, please send me a PM, or leave your comment in the Feedback/Suggestions chat and I will read it later.