service club vs social club

service club and social club both are nouns.

Word	Noun	Adjective	Verb	Adverb
service club	Yes	No	No	No
social club	Yes	No	No	No

As nouns, social club is a hypernym of service club; that is, social club is a word with a broader meaning than service club:

service club: a club of professional or business people organized for their coordination and active in public services
social club: a formal association of people with similar interests

Other hypernyms of service club include club, gild, guild, lodge, order, society.

service club (noun)	social club (noun)
a recreational center for servicemen	a formal association of people with similar interests
a club of professional or business people organized for their coordination and active in public services