dinner theatre vs British spelling

dinner theatre and British spelling both are nouns.

Word	Noun	Adjective	Verb	Adverb
dinner theatre	Yes	No	No	No
British spelling	Yes	No	No	No

dinner theatre (noun)	British spelling (noun)
a theater at which dinner is included in the price of admission	English orthography used in the UK, Ireland and most of the Commonwealth (characterized by 'analyse', 'centre' and 'useable')