Conversation so far:
How did Sandy Denny get started in her career?
Sandy Denny had secured a place on a foundation course at Kingston College of Art, which she took up in September 1965, becoming involved with the folk club on campus.
What did Sandy Denny do in the club?
After Sandy Denny's first public appearance at the Barge in Kingston upon Thames Denny started working the folk club circuit in the evenings with an American-influenced repertoire.

Question: What did she do there?
Self-contained rewrite: What did she do in the folk club circuit?