The socials in all schools, unless otherwise designated ( very unusual )are American style.
You need to know , that the F/trots are at a much faster tempi than the Intern style, but they do play slower ones also, as the Silver standard is the same speed as the Intern.
The music for socials is far more varied, than you would get at a strictly Intern. social in both latin and standard.
Also, the dance variety is far more extensive ( 3 styles of swing for e.g. ) .