There's always one lane of bocce ball and one lane of shuffleboard designated for walk-ins only - these courts are first come first serve, and are free.
If there are others waiting to play, each group plays for twenty minutes and then gives up the court to the next group in line. When your twenty minutes is up, you're free to sign up a second time. If there's no one waiting to play, you can play all night long.
On top of all that, all four courts are free from midnight until 2 a.m., so come early and stay late.
If you like to plan ahead, courts are also available for rent by the hour at $40/hr per court (tax included) - click below to make a lane reservation.