All activities with location data for notifications and presence tracking.
{
"id": "session-pickup-basketball",
"type": "session",
"title": "Pickup Basketball",
"startTime": "2026-01-30T21:53:22.047Z",
"location": {
"name": "Buddy Todd Park",
"lat": 33.195,
"lng": -117.3537
},
"radiusM": 200
}