Having been involved at the Museum for more than 20 years, I meet a lot of people, many more than once. So whenever I go places, if I see someone that looks familiar I assume that I must have met them at the Museum at one point or another.
Today I took Amtrak Downeaster trains 682 and 683 to Boston and return, because the Amtrak Great Dome car is on for the next month. I was wearing my (well-worn and faded, paint speckled) WW&F hat. Waiting for the train to arrive at the Brunswick platform, I noticed a fellow who looked a little familiar. He noticed my hat, and mentioned he had been at the picnic a couple of weeks ago. We both sat for a time in the dome. I don't think we've ever conversed before, so I don't have his name.
On the way back, the Train Riders Northeast train host saw my hat and asked if I was involved. When I told him yes, he mentioned he had been there for the Mass Bay RRE February photo trains, and asked if I was there. I said I was, but at that point couldn't recall what I had done. Later I remembered I was conductor for one of the trains, so I mentioned it to him and he mentioned he had done the write up in their newsletter for it.