Half hour meditation, followed by traditional Rayaku Fusatsu full moon ceremony. The oldest ceremony in Buddhism! Full of lots of bows and beautiful chanting, including a reciting of the 16 precepts. No one's saying you have to follow these 16 rules all the time (most say that's impossible anyway), but saying them out loud once a month definitely doesn't hurt.

No formal talk, but pie and tea will be served after the ceremony.