I'll PM you with our practice for that. We have done it in the past with groups and some from the ADV Rider forum. In reality 80% of our students are already members here and 100% are when they get home from the class.
It was a way for riding buddies to take the class together, really or in their minds keep the skill levels similar. But in reality we can do that better on our side from experience. Learning skills and riding ability are two different things and in our class the fastest rider in the group may be the one who has the hardest time with learning. Then after class the results are obvious.