What is the event that has the highest attendance of the students from the Student_Club?
event with highest attendance refers to MAX(COUNT(link_to_event))
SELECT T1.event_name FROM event AS T1 INNER JOIN attendance AS T2 ON T1.event_id = T2.link_to_event GROUP BY T1.event_name ORDER BY COUNT(T2.link_to_event) DESC LIMIT 1