You want to do something. You are one or two people short. Drop a pin where you meet and say when, and whoever is nearby and free can tag along.
Every plan has a pin. You see what is happening within a few kilometres of you - soonest first, or newest first.
Every plan has a chat only the host and the people who joined can read.
Follow the good ones and see when they are coming. Block whoever turned up with a pitch - their plans leave your feed, and you are warned if they join one you are in.
A small shared machine. Do not use a password you use anywhere else. Where you are stays on your device.
Or tap the map. This is only used to pick what you see and never leaves your device except with that question.