How can I enable guests to participate in a chat activity?

1. Create a visitors role with the capability mod/chat:chat allowed. To create a role:

• Go to Settings > Site administration > Users > Permissions > Define roles.
  Click the "Add a new role" button.
• On the add a new role page, give the role a name e.g 'Visitor' and a short name.
• Give the role a description (optional).
• Select the contexts where the role may be assigned e.g. 'User' for visitor role.
• Set permission as required and allow mod/chat permission.
• Scroll to the top or bottom of the page and click the "Create this role" button.

2. Then create an account and assign it the role of visitor. Guests can then share this visitor account.