They were here to see the sunset from the Brooklyn Heights Promenade.
The view from my corner, with silhouetted tour-bus crowd:
It was 72° and beautifully clear, not that clearness makes for the prettiest sunset. It doesn't. But the promenade was crowded with people and doggies:
I walked to the end of the promenade and turned onto a side street. It seemed as though everyone in the world was walking a dog:
UPDATE: At 10:40, I was sitting out on my terrace, watching the newly downloaded episode of "America's Next Top Model" and glancing up from time to time at the city lights, and suddenly there was a fireworks display out on Liberty Island. I have no idea what the occasion was. Surely, it wasn't the last day of classes, though that was an occasion for me. Perhaps you imagine all the lawprofs out on the town carousing the night after the last day of classes. But no, I was spending a quiet evening at home in my temporary home in Brooklyn Heights, but someone, somewhere, put on a fireworks display that I could fantasize was a celebration of the beginning of my lusciously 4-month-long summer. Yes, there are exams and many other tasks to accomplish, but still: It's summer.