Is going to be a good old fashion Fartlek session (Indian Running).......
So lets buy some Xmas hats to add to the spirit this is the last quick session of the year and before we eat lots of food.
This well be the session below
This interval technique is a modified version of fartlek training that works really well for groups of people (6 or more). Stay together as a group, but spread out single file as you hit the road. When everyone feels warmed up, the person at the back of the line increases her/his speed in order to pass everyone en route to the front, and then returns to the pace of the rest of the group, while the next person at the back of the line dashes