The challenge ladders at my club have had weak participation from the men, and almost zero participation from the ladies. I'm looking for suggestions to increase participation in the ladders, during the summer, while we have no league play other than mixed doubles. We have ladders set up for men's singles and doubles, and women's singles and doubles. The men's singles is about the only one played, and only a hand full participate in it. The ladders are free, we use a website to manage them, and most members have registered at the site. The average age of the adult players, at my club, is probably close to 50. Most work and have families. What has worked, in your experience, to make challenge ladders successful in your area?