[bemmu]

At the large Finnish LAN party / demoscene event Assembly, there are people who go around all the desks collecting the cans and bottles people leave on them. I wonder how much they make doing this, considering there are thousands of desks with everyone consuming energy drinks and soda nonstop.

[mattl]

I once paid for most of my trip to a hacker event in Germany by picking up and returning all the discarded bottles of beer and Club Mate. It took maybe two hours.