Young and old, beginners and accomplished writers, the ever-changing collection of Stone Soup poets met every Monday night to recite in a series of venues before an attentive audience that was not above voicing its opinion. "Boston is full of elite universities and institutions, often very exclusive, where if you don't have an academic pedigree you're out of the scene," said Doug Holder, a poet and teacher who at one point worked with Mr. Powers on the Stone Soup readings and founded Ibbetson Street Press.