The West Linn Public Library holds an every-other-month Trivia Night in our Community Room. We do not require registration but ask people to form teams of two to five people and just show up. People who do not come with a team are welcome to join another team as long as it remains five people or less. The program is targeted to adults, but all ages are welcome, and we usually have at least one family with kids that shows up.
With funds from our programming budget we are able to provide pizza, microwave popcorn and prizes. We used to give out prizes ($5 gift cards to places such as Starbucks, Barnes & Noble, Powells and Amazon), but because the same team wins every time we are moving to a "bragging rights" prize.
Encourage some friendly competition in the library with a Trivia Night for all ages.