A Drop In Class?

I am looking at a new idea for teaching.

I would like to make an informal “drop in” class at least once a week which would last one and a half hours, maybe longer.

My idea is that this should be free for everyone who has had a class with me in the past, but if you bring a friend the cost would be Five British Pounds per class.

There are a few difficulties which I need to think about. Firstly, Skype holds conferences but there is a maximum number. I am unclear how many that is. I think it is 25.

I want it to be as informal as possible, its simply another chance to learn something new.

If interested please let me know, it is likely to be on a weekday around 10am UK time.