All of us know and use this format of lessons. Nevertheless, I saw so many examples when discussion clubs were just a simple chatter and, from my perspective, gave students almost nothing for their development. 

How do you organize discussion clubs/rounds? Do you just give your students an initiative to talk or add some other activities?

Here is the strategy I use with my students when I want to organize a discussion club/lesson. Will you have any recommendations for its improvement? Or can you share you own experience?

1. We decide on the topic. We discuss our interests and choose smth interesting and/or useful for the whole group.

2. I prepare a vocabulary bank on this topic and send it to the students. It helps them to prepare for the lesson and improves their vocabulary.

3. I give them some task, mostly to present about smth (for example, if we discuss hobbies, I ask them to find in Internet some hobbies which are very unusual and extraordinary and to tell us about them)

4. I search for some interesting video or a short video to read/watch and discuss in class.

5. I also try to find/think out some games connected to the topic.

6. I include all these part into lesson plan and try to interlace fun and some serious work on comprehension and speaking during the class. 

During these classes, I work as a facilitator and write down all the mistakes students make while speaking. We have some breaks from discussion and try to correct the mistakes I collected ll together.