Show all the party forms.
select * from party_forms
Show the form name of each party form.
select t1.form_name from forms as t1 join party_forms as t2 on t1.form_id = t2.form_id
Which one is the most popular party form?
select t1.form_name from forms as t1 join party_forms as t2 on t1.form_id = t2.form_id group by t2.form_id order by count(*) desc limit 1