Word origins and semantics..
The very word " Ballroom " denotes a space where dance activity may be possible ( I say poss. because they are used for other events )
The word has come to mean different things to different people,, essentially, somewhere , a place, that provides a floor or space and music, for our dancing pleasure .
In the world of teaching, there are specific nomenclatures for WHAT we teach..i.e.
Standard.. Latin.. Smooth.. Rhythm.. Salsa.. T./Arg.. Polka, VW. etc.
ALL of these may be danced in a ballroom or other appropriate venues, in a social or competitive setting.
So, by their very nature and usage, are they not ALL ballroom dances ? .. or are we back to semantics ? (even salsa is danced in studios, that are rented out, and are more classified as ballroom venues ).
The "social " dances that some countries teach, would be considered at one time, to be of a Competitive nature, and are now mainstream Q.step is a classic e.g.( B.R. or Social ?.. actually both )