Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE CLASS (class_room VARCHAR)
### Question:
Find the number of classes offered for all class rooms that held at least 2 classes.
### Answer:
SELECT COUNT(*), class_room FROM CLASS GROUP BY class_room HAVING COUNT(*) >= 2