BlackBerry Messenger is a cross platform instant messaging allowing iOS, Android, BlackBerry and Windows Phone users to make voice calls, send messages and share content. It also integrates features to host group chats. Group chats allows up to 30 users to communicate among themselves, share events, lists and pictures.
Create a Group in BBM
Open the BBM app and tap on Groups > Create New Group:
Give a name to the group, as well as a short description, tap on Save:
Select the type of content to be shared by the new group (Chats, Pictures, Lists, Events, Contacts):