This was on its way towards grumpy, but then...
I'm at the dentist this morning, but it was raining (very strange for NorCal in late May), so I had a bunch of rain clothes to remove after getting off my bike and getting inside. I set my keys down on the couch I was sitting on and accidentally walked away without them. I go through my dental appointment, start to leave, and realize I don't have my keys. I search the dentist's office: no keys. I ride the elevator back to the lobby where I had changed out of the rain gear: no keys. I go back to the dentist's office and ask the receptionist what the best bet for a lost and found is: she says the woman working the security desk downstairs (up to this point, I had seen no such woman at the apparently empty desk). Other than that, she has no idea what to do.
So I head back to the lobby and, sure enough, still no woman sitting at the desk. Maybe she's walking around doing security checks--security at my building does that. So I wait. Eventually a woman walks in carrying a backpack and heads to the desk. I ask her if she's the security person; she is. But she has only just arrived, and no, she has no idea about any keys. Grrr. My bike is locked up outside, where I will have to leave it until god knows when...
In walk a pair of women who overhear my last entreaty to security guard about where I might look for my keys (in an 8-floor building, the security guard says maybe someone picked them up, but has no idea how to identify that hypothetical person).
Oh, says one of the women, someone just posted about found keys. Here, I'll help you get them. She had seen the internal post (slack maybe?) while riding the train. She takes me up the elevator to a different floor than my dentist, to a receptionist's desk, and sure enough, there they are. Hooray for the wonderful woman who helped me out (and really turned around what would have been a grumpy situation).
That said: did the security guard or my dentist's receptionist think to check whatever group channel that was? No, they did not. That would make me grumpy, but I'm feeling fortunate and grateful to train woman who helped me out of a jam.