Count the active businesses that has an attribute of BYOB with high review count.
active business ID refers to active = 'true'; category of Food refers to category_name = 'Food'; attribute of BYOB refers to attribute_name = 'BYOB'; high review count refers to review_count = 'High'
SELECT COUNT(DISTINCT 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 T3.attribute_name = 'BYOB' AND T1.review_count = 'High' AND T1.active = 'true'