Focus: Fun and Freshmeat (skating fast, changing direction).
One or two skaters (I pick several if they are freshmeat but only one if they are an advanced skater) start in the middle of the hall these are the 'bulldogs'. All remaining skaters stand at one end of the area (their home). The aim of the game is to skate quickly from one end of the hall to the other, without being caught by the bulldogs. When a skater is caught, they become a bulldog themselves.
The winner is the last skater or skaters 'free'. To make it more team based assign people teams before hand and the team with most people not captured at the end wins.
To make this more relevant to derby, skaters only become bulldogs if they have been hip checked - not just tagged.