My Taiwanese co-worker asked me if I know of any good English schools in Taipei for adults. She is not looking for a private tutor, just a school where the management and teachers provide a good product to adult students.
I know some that are good to work for, and like to believe that the ones I work for have good teachers.
But the truth seems to be that most of them will tell the prospective student whatever they want to hear to get their money, and take little notice of what goes on in the classroom.
Some of my students have also studied at Wall Street and few of them have anything good to say about the place, but I have no personal experience of them.
Can you be a bit clearer about what your friend’s learning objectives are? Some kind of a test? Business English? General conversation?