SELECT t1.party_email FROM parties AS t1 JOIN party_services AS t2 ON t1.party_id  =  t2.customer_id GROUP BY t1.party_email ORDER BY count(*) DESC LIMIT 1
Which is the email of the party that has used the services the most number of times?
SELECT t1.party_email FROM parties AS t1 JOIN party_services AS t2 ON t1.party_id = t2.customer_id GROUP BY t1.party_email ORDER BY count ( * ) DESC LIMIT 1
select t1 . party_email from parties as t1 join party_services as t2 on t1 . party_id = t2 . customer_id group by t1 . party_email order by count ( * ) desc limit value
Which is the email of the party that has used the services the most number of times ?