Works well where I work. Some ground rules to help are: * Do the bulk during work hours. * Be 100% accepting of people who don't wanna spend free time on it.

Works well where I work. Some ground rules to help are: * Do the bulk during work hours. * Be 100% accepting of people who don't wanna spend free time on it. Or compensate. * Add in loads of general fun. * Let the employees be in charge of what constitutes fun. * Go light on the actual work. * Plan well ahead, respect people's own schedules.