I'm thoroughly impressed with this concept! A few years ago, amidst the COVID madness that had everyone on edge, I had a similar aspiration of facilitating short, refreshing coffee breaks with unknown individuals. It's wonderful that you folks have actually made it happen!
As for some input: I'm often on my mobile, and sharing anyone through that medium is much more appealing than via email or text message. At least in my viewpoint, platforms like iMessage and WhatsApp are increasingly significant in today's world.