My avenue is through the school systems. That's right, schools. Fundraising creates enthusiastic opportunities. One good production leads to another. The schools are willing to donate their theater spaces and rehearsal spaces.
Any production is an opportunity to test a script under production conditions.
Productions allow the playwright to experience the audience's reactions and determine when and where rewriting needs to be done. Sure, limitations exist, but there are ways to deal with or mitigate portions of a script. The organization around a school setting provides for built-in participants and a ready and eager audience. Before getting into the details of these elements, first consider how to locate and approach the right situation. In my case, the attendance of my daughters was a terrific calling card.