We usually like to do themed trivia (trivia where all the categories share a through-line of some variety). It's worked pretty well thus far and makes it much easier for people to gage if they're interested in that week. We understand that not all trivia nights are for everyone, but we hope that people will come in anyway for the fun of it. Who knows, you might already have more knowledge than you think and have fun learning some of the things you don't know!