Possible Clues:

• One reading supertitles, maybe
• When sick, agree poor Norma could be seen by one
• One attending music theatre
• Carmen's patron?
• Met fan in old gym — amateur working out with Roger
• Attendee at a 17-Across performance
• One enjoying Carmen, say
• Met somebody?
• Music lover getting poorer with age, unfortunately
• 59 Across fan, quite possibly