Idea for an app that you can utilize at a concert or a festival

Hello everybody! Just wanted to share the idea I had for an app, and please tell me if you think it would be helpful or worthless, it would be kind of cool to have an app that you can use at a concert that can connect all of the people at the show in different ways. The app could use GPS location to connect you with other people at the same show as you, and let you talk to fellow fans/see what other people are saying about the show and stuff like that. It could also have a section where you can just see everyone else in the crowd at the venue, and see all the way around the area if you want to take a selfie with the band in it you could see a camera view from other phones all around the venue to help you frame the shot the best. Just think it could be a cool way to connect with people at the show if you want to and have a better experience. What do you guys think?