Conversation so far:
What kind of community work did Matthew Boulton do?
Matthew Boulton's friend Dr John Ash had sought to build a hospital in the town. Boulton conceived the idea to hold a music festival to raise funds for the hospital.
Was the music festival held by Matthew Boulton a success?
The music festival conceived by Matthew Boulton took place in September 1768, the first of a series stretching well into the twentieth century.
Are there any other interesting aspects about the Matthew Boulton article?
Matthew Boulton helped found the New Street Theatre in 1774.

Question: What else can you tell me about the theater?
Self-contained rewrite: What else can you tell me about the New Street Theatre besides its founding by Matthew Boulton in 1774?