Building-specific rules
Many of the businesses have particular activities that posse members can do in them (e.g. the Doctor can attempt to heal injuries in his surgery) – to find out what they all are posses should visit them!
These activities, along with various town competitions etc., can be viewed as “mini-scenarios” that posse members may wish to explore. It is perfectly possible for posses or individual posse members to spend entire game sessions wandering around town taking part in these “mini-scenarios” if they wish to.