New Collective Noun

Last night I took my daughter downtown to practice nighttime city driving [1], and we encountered crowds of people crossing the streets [2]. Sometimes we had to wait quite a while for a gap in the pedestrians so that we could turn. I decided that there should be a collective noun to describe a group of pedestrians, so I invented one: an amble of pedestrians.

Now I want to find a way to fit that phrase into a story. What’s your favorite collective noun?

[1] She did a great job negotiating the crowds, handling the traffic with patience and poise.
[2] It turns out the Rockets game had just ended.