Running the fence

Have a single pace line, about a foot away from the inside track line. The last person in the pace line is the jammer, and they have to get through the gap made between the skaters and the inside line. If they cut the track, they have to stop, go back and reenter the pace line from whoever they cut in front of.

It's really not a lot of space.

As the jammer, you have to pick up your feet a lot. (I know I don't do this as much as I should.) Since there's not much room, you can't propel yourself by sticky skating or whatever; there's not enough room really to have both your skates on the ground side by side.

Variation: have the pace line again, but on the outside line. This makes your jammer have to work much harder since they have to go faster to cover more distance.

Variation 2: have the pace line, but have your hip sticking out a bit over the line to offer some resistance to the jammer as they are getting past.