Conversation so far:
What was one of the theatres where John Barrowman performed?
Prince Edward Theatre
What role did John Barrowman play at the Prince Edward Theatre?
Billy Crocker in Cole Porter's Anything Goes
What year was Cole Porter's Anything Goes at the Prince Edward Theatre with John Barrowman as Billy Crocker?
1989
What other theatre roles did John Barrowman play other than Bill Crocker in Cole Porter's Anything Goes?
Domingo Hernandez in Matador

Question: Did he work at other theatres?
Self-contained rewrite: Did John Barrowman work at other theatres besides Prince Edward Theatre?