I have an idea for an app based on bitchat. It's like bitchat and you can use it as a local chatroom function. But the main purpose is to see who is listening to what on a eg a train journey. And you can listen to other people's music (or podcasts etc), (and let other people listen to your music). Not sure how that works over a mesh. However, it could also just be interesting to see what people in your proximity are listening to and comment on it. I think it could be quite funny. I'll make a poll: