Collect money for a Super Bowl party

You always host a Super Bowl party, but this year, with your team in it after many, many hard years, you want to go over the top. So you're going to rent out a screen at the local theater and invite a ton of people to come. You've got your costs for the rental and the catering estimated and you need some help. You find that there's a lot of enthusiasm for the idea of watching the game in a theater, so collecting the money should be no problem. Aside from having to handle all that cash and make a lot of bank deposits. You need a way to get a head count for the party and collect enough to cover its costs without all the paper.