Do you know what a float trip is?

Serious question. I had a friend born and raised near Seattle who I invited to come on a float trip in southeast Missouri. Her mind was blown that this is a thing people do - drinking and making a ruckus while floating down a river.

In MO, this is just a thing that people do. At least in rural areas. I had no idea it was regional. So, how far across this region does the concept of float trips go?