These guys used to be called Lynk. Here's their product hunt post from awhile back:https://www.producthunt.com/tech/lynk-messenger. Awesome to see them doing so well!

This is cool but I don't see why I would want to text/chat someone in the same room as me. The feature I'm most interested in is the fact that it'll tell you the names of everyone in the room. That's a feature I'd pay big bucks for.