If the speaker wants to establish an event as a shared experience, what should he or she use?

World cafe format.

Explanation:

The World Cafe format is a simple methodology of hosting a group event. In this format of hosting a group event all the participants are required to participate by having dialogues, sharing experience, knowledge, etc.

The setting of such group event is like a cafe, set around round tables, seated with four to five people on one taable. A topic of mutual interest is given and people around the table would share their knowledge on the given topic that enables to bring out a comprehensive message out.

So, the correct answer would be 'the world cafe format.'

we need to see the statements.