Conversation so far:
When did John Butler's solo career begin?
On 29 June, Butler gave a live solo performance at Twist and Shout Records in Denver, Colorado, which was released in January 2008 as an eight-track EP.
Did John Butler play anywhere else besides Twist and Shout Records in Denver, Colorado?
John Butler played at the Montreal Jazz Festival.

Question: Where else did he play?
Self-contained rewrite: Where else did John Butler play besides the Montreal Jazz Festival?