How many restaurants in Broadway, Oakland received a review of no more than 3?
Broadway refers to street_name = 'broadway';  Oakland refers to city = 'oakland'; a review of no more than 3 refers to review < 3
SELECT COUNT(T1.id_restaurant) FROM location AS T1 INNER JOIN generalinfo AS T2 ON T1.city = T2.city WHERE T1.street_name = 'broadway' AND T2.review < 3 AND T1.city = 'oakland'