Well, on Grindr, I've seen a lot of people using it to find friends with common interests. For example, some guys are into fitness and they use Grindr to find workout buddies. They might start chatting about their fitness routines, like which gym they go to, and what kind of exercises they prefer. It's a great way to meet like - minded people outside of the romantic or sexual context.
There are also users on Grindr who are into art. They might share their latest artworks or talk about art exhibitions in the area. I once saw two guys on Grindr having a great conversation about street art. They were discussing their favorite street artists, and they even planned to go on a street art tour together. It just goes to show that Grindr has more to offer than just romantic or sexual connections.