Open Space is a useful if there are many participants. The recommended number varies from ten people to several hundred. An Open Space could last anywhere from half a day up to three days and is led by at least one person. The modus operandi is that you meet and together come up with the specific subjects you want to discuss in connection with the theme. Anyone who wants to can propose subjects and the ones that interest enough people to have a discussion are the ones that will be discussed. The discussion subjects are written in a timetable for the meeting’s various sessions, and each discussion is led and documented by the person who suggested the subject. You divide yourselves into groups in different rooms, and discussions are terminated when it is time for lunch or coffee. It is common to divide a full day into three sessions, and to start with an inspiration lecture. During discussions you are free to change group if you want to, and this could enrich other discussions by exchange of good ideas between groups. Finally, the groups get together for a summary of the discussions and an appraisal of the meeting. Some kind of written documentation should be compiled for the participants, and will provide a good basis for continued work in the area.
The dialogue is important in all types communication and there are several methods and tools. One good advice is to meet people where they are and not to expect them to come to you.