I think Satoshi's Place in England ran an event like that after they launched. Posted QR codes all over Manchester or wherever it is they're based....
Discussion
Epic. But sadly doesnt work in decentralized way. And I wouldnt want to hold other peoples coins
Unfortunately I wasn't able to attend so didn't see the finer details of it. Pretty sure you had the option to withdraw stuff from their LNBits wallet to your own if you wanted to once the event was over.
Those guys are doing some good work with education/building on Bitcoin bootcamps/general onboarding to be fair.