What might an on-the-street participatory justice lab be?

After reading and thinking about various participatory design and open innovation strategies, I’ve been brainstorming around how to get more community input into the redesign of the legal system.

Could we have a roving laboratory, a pop-up place that would consult with people about what services they want, how they want to get them, and test various prototypes for new services with them?

There could be compensation, services, design training in exchange for people’s input. It could mix direct services with co-design work. Perhaps we could have corporate sponsorship that would allow scale. 

Rather than have just community service fairs or legal clinics, can we use these moments of provider-to-people interactions to be more creative and lead to a better future?