search for: bookstores_by_c

I currently have a database with a table called bookstores. Within that table are columns such as bookstore name, city, state, and zip code. What I''d like to do is display the City and then every store name for that city underneath it. i.e. City - Store 1 - Store 15 Another City - Store 2 - Store 5 etc. I''ve seen act_as_tree but I don''t know if