There's always a tournament structure, but I'm betting you're not interested in hosting 11 consecutive games.
I did a Family Feud game once (but not live), and I had each team give me a list of answers they wanted to guess. All teams played the same puzzle at the same time. They could write as many answers as they wanted, up to the number on the board. If they gave three or more strike answers, they had a random chance to have the bank "stolen," or lost, based on the value of what they didn't get. We played a fixed number of rounds (I used three singles, two doubles, and a triple), and the high scoring team after all six won.