Task: Text to Code
Input (English): SQL: SELECT T1.City_Town FROM Addresses AS T1 JOIN Clients AS T2 ON T1.Address_ID = T2.Address_ID GROUP BY T2.Address_ID HAVING Count ( * ) < = 1
Feedback: find customer id of customers table in step 2. make sure greater than or equals 1 in step 3 and city does not have performer .
Output (English): SELECT T1.City_Town FROM Addresses AS T1 JOIN Customers AS T2 ON T1.Address_ID  =  T2.Address_ID EXCEPT SELECT T1.City_Town FROM Addresses AS T1 JOIN Performers AS T2 ON T1.Address_ID  =  T2.Address_ID