We leased one of those "Money Wind Machines" where the person gets an opportunity to spend say 2 minutes grabbing dollar bills in the machines sealed room.
You have people fill out the "raffle tickets" in great detail, then they have to be there for the "hourly" drawings. Not a bad use of around $200.00 in currency plus the cost of the rental. We had a ton of signups. Also make sure to ask for their email addresses. If you have internet connection where you are you can quickly check which info is bogus.