Show all cities along with the number of drama workshop groups in each city.
create table addresses (city_town varchar, address_id varchar, PRIMARY KEY (city_town)); create table drama_workshop_groups (address_id varchar, PRIMARY KEY (address_id))
select t1.city_town, count(*) from addresses as t1 join drama_workshop_groups as t2 on t1.address_id = t2.address_id group by t1.city_town