I always think a good icebreaker would be to give away gifts. Like you just need to carry one around with you in your pocket or something.

So… what we need, is a social excuse for ppl to bring around gifts to give to supposedly random people!

Now, the excuse is…
You buy the gifts in contract with some charity cause - the gifts that are sold that way, in the stores that support it - and the trick is that the charity money can only be activated by somebody who didn’t buy the gift.

I don’t know how to verify it - obviously the cashier would have to know something about your information. If you pay with cash or credit, I suppose that part’s easy. If you pay with cash, who knows… a driver’s license number or phone number maybe.