What’s with the groups hanging out in the parking lot at Amazon Flex pick-up spots?

I have been doing Amazon Flex for about a month and a half now, and every time I pull up to grab my route, a whole group of people just posts in the parking lot. They are not in line, scanning, or doing anything—just standing around like it’s a block party or something.

I’m tryna figure out — are they waiting for some last-minute loads to drop? Or is this like a “Flex secret society” I ain’t unlocked yet?

Somebody put me on ‘cause I'm lowkey confused every time I see it.