I'm not sure if this has ever been suggested before, but I'd like to purpose a new skill available to all classes and races.
Teach
The basic function of this skill is to teach others another skill. Such as 'Teach 'Bob' Parry'. This will give 'Bob' a greater knowledge of parry every other tick. The amount of knowledge given to 'Bob' could be based on his Wisdom and Intelligence stat, as well as the Wisdom and Intelligence of the 'Teacher.'
This would give people a reason to gather inside the cities once again, especially when there is no hunting group or gear gathering group available. And in turn, the more gathered in the same room to hear the lessons, the more RP will flourish from the encounter.