> so worth planning to use apps that can chat over P2P WiFi or Bluetooth togethe...

> so worth planning to use apps that can chat over P2P WiFi or Bluetooth together with the rest of your friends

I can't even get Bluetooth audio to work reliably in a crowded cafe, are you sure these other protocols would fare better?

Messaging doesn't have the same real-time requirements. It's still often flaky.