I don't know much about these things, but is it normal that they advertise the fact that they have a practice lesson at the end of each course where you don't learn anything new? To me that sounds a bit like wanting to prolong the courses to get extra money.
Also, we are in a course of about 25 couples in a tiny room - well, not tiny, but just not big enough for 50 people who are waltzing and who are more concerned with the steps and the rhythm than with watching where they are going. Can be quite dangerous

. There's a Fortgeschrittenenkurs (4 couples) in the room next door and that room is gigantic...
Thanks for the old thread but we don't really need dancing lessons in English since we're both German.