Indoor Mini Putt Game?

Hello,
I am planning a Christmas party for the office. We would like to have a tournament of mini putt (golf). Any ideas on how to make one, I contacted companies that rent them, but they are charging $700 for one day.

mini putt maybe OK but people drink at these parties – don’t be supplying them with weapons – I had to save a person from a crazy drunk wielding a club! LOL