Write SQL query to solve given problem: How many businesses in Phoenix, Arizona is attributed to waiter service?. Keep the solution inside sql tag ```sql [SQL-Query] ```
SELECT COUNT(T1.business_id) FROM Business AS T1 INNER JOIN Business_attributes AS T2 ON T1.business_id = T2.business_id INNER JOIN Attributes AS T3 ON T2.attribute_id = T3.attribute_id WHERE T1.city LIKE 'Phoenix' AND T3.attribute_name LIKE 'waiter_service' AND T2.attribute_id = 2