Gym Exercise Equipment

I am getting bored with the treadmill and recently injured my right foot, which is now healing. Are there any other machines I can use for cardio?
There is a particular cardio machine that has you holding two handles, one in the right hand and one in the left hand, attached to two ski like equipments(not sure if I am describing it well) that goes forward as you push each handle(I like it).

Any other machines please. I work out @ Bally Total Fitness.

When I’m working out, I usually move from one set of equpment to the next. Why are these people just sitting on the weight benches looking around at other people? Are they bored, or tired from working out? Don’t they know other’s are waiting to use the equipment too?