For interaction with other attendees, you first need to find the person you want to talk to using the map. If you don’t know where this person is, you can find them by clicking on the attendees button and writing down their name.

After you find the person you want to talk to, just click on them on the map, and it will create what we call a "huddle."

After this, you are good to go and have a nice talk.

To exit a huddle, click on an empty area on the map.